[331] | 1 | /*
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| 2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | /* ====================================================================
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| 11 | * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
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| 12 | *
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| 13 | * Portions of the attached software ("Contribution") are developed by
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| 14 | * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
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| 15 | *
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| 16 | * The Contribution is licensed pursuant to the OpenSSL open source
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| 17 | * license provided above.
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| 18 | *
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| 19 | * ECC cipher suite support in OpenSSL originally written by
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| 20 | * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
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| 21 | *
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| 22 | */
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| 23 | /* ====================================================================
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| 24 | * Copyright 2005 Nokia. All rights reserved.
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| 25 | *
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| 26 | * The portions of the attached software ("Contribution") is developed by
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| 27 | * Nokia Corporation and is licensed pursuant to the OpenSSL open source
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| 28 | * license.
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| 29 | *
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| 30 | * The Contribution, originally written by Mika Kousa and Pasi Eronen of
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| 31 | * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
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| 32 | * support (see RFC 4279) to OpenSSL.
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| 33 | *
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| 34 | * No patent licenses or other rights except those expressly stated in
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| 35 | * the OpenSSL open source license shall be deemed granted or received
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| 36 | * expressly, by implication, estoppel, or otherwise.
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| 37 | *
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| 38 | * No assurances are provided by Nokia that the Contribution does not
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| 39 | * infringe the patent or other intellectual property rights of any third
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| 40 | * party or that the license provides you with all the necessary rights
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| 41 | * to make use of the Contribution.
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| 42 | *
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| 43 | * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
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| 44 | * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
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| 45 | * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
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| 46 | * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
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| 47 | * OTHERWISE.
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| 48 | */
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| 49 |
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| 50 | #include <stdio.h>
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| 51 | #include "../ssl_locl.h"
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| 52 | #include "statem_locl.h"
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| 53 | #include <openssl/buffer.h>
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| 54 | #include <openssl/rand.h>
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| 55 | #include <openssl/objects.h>
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| 56 | #include <openssl/evp.h>
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| 57 | #include <openssl/md5.h>
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| 58 | #include <openssl/dh.h>
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| 59 | #include <openssl/bn.h>
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| 60 | #include <openssl/engine.h>
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| 61 |
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| 62 | static ossl_inline int cert_req_allowed(SSL *s);
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| 63 | static int key_exchange_expected(SSL *s);
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| 64 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b);
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| 65 | static int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk,
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| 66 | unsigned char *p);
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| 67 |
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| 68 | /*
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| 69 | * Is a CertificateRequest message allowed at the moment or not?
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| 70 | *
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| 71 | * Return values are:
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| 72 | * 1: Yes
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| 73 | * 0: No
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| 74 | */
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| 75 | static ossl_inline int cert_req_allowed(SSL *s)
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| 76 | {
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| 77 | /* TLS does not like anon-DH with client cert */
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| 78 | if ((s->version > SSL3_VERSION
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| 79 | && (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL))
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| 80 | || (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aSRP | SSL_aPSK)))
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| 81 | return 0;
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| 82 |
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| 83 | return 1;
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| 84 | }
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| 85 |
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| 86 | /*
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| 87 | * Should we expect the ServerKeyExchange message or not?
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| 88 | *
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| 89 | * Return values are:
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| 90 | * 1: Yes
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| 91 | * 0: No
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| 92 | */
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| 93 | static int key_exchange_expected(SSL *s)
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| 94 | {
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| 95 | long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
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| 96 |
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| 97 | /*
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| 98 | * Can't skip server key exchange if this is an ephemeral
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| 99 | * ciphersuite or for SRP
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| 100 | */
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| 101 | if (alg_k & (SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK
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| 102 | | SSL_kSRP)) {
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| 103 | return 1;
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| 104 | }
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| 105 |
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| 106 | return 0;
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| 107 | }
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| 108 |
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| 109 | /*
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| 110 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed
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| 111 | * handshake state transitions when the client is reading messages from the
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| 112 | * server. The message type that the server has sent is provided in |mt|. The
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| 113 | * current state is in |s->statem.hand_state|.
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| 114 | *
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| 115 | * Return values are:
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| 116 | * 1: Success (transition allowed)
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| 117 | * 0: Error (transition not allowed)
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| 118 | */
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| 119 | int ossl_statem_client_read_transition(SSL *s, int mt)
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| 120 | {
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| 121 | OSSL_STATEM *st = &s->statem;
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| 122 | int ske_expected;
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| 123 |
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| 124 | switch (st->hand_state) {
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| 125 | case TLS_ST_CW_CLNT_HELLO:
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| 126 | if (mt == SSL3_MT_SERVER_HELLO) {
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| 127 | st->hand_state = TLS_ST_CR_SRVR_HELLO;
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| 128 | return 1;
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| 129 | }
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| 130 |
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| 131 | if (SSL_IS_DTLS(s)) {
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| 132 | if (mt == DTLS1_MT_HELLO_VERIFY_REQUEST) {
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| 133 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST;
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| 134 | return 1;
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| 135 | }
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| 136 | }
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| 137 | break;
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| 138 |
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| 139 | case TLS_ST_CR_SRVR_HELLO:
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| 140 | if (s->hit) {
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| 141 | if (s->tlsext_ticket_expected) {
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| 142 | if (mt == SSL3_MT_NEWSESSION_TICKET) {
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| 143 | st->hand_state = TLS_ST_CR_SESSION_TICKET;
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| 144 | return 1;
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| 145 | }
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| 146 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
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| 147 | st->hand_state = TLS_ST_CR_CHANGE;
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| 148 | return 1;
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| 149 | }
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| 150 | } else {
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| 151 | if (SSL_IS_DTLS(s) && mt == DTLS1_MT_HELLO_VERIFY_REQUEST) {
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| 152 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST;
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| 153 | return 1;
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| 154 | } else if (s->version >= TLS1_VERSION
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| 155 | && s->tls_session_secret_cb != NULL
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| 156 | && s->session->tlsext_tick != NULL
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| 157 | && mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
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| 158 | /*
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| 159 | * Normally, we can tell if the server is resuming the session
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| 160 | * from the session ID. EAP-FAST (RFC 4851), however, relies on
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| 161 | * the next server message after the ServerHello to determine if
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| 162 | * the server is resuming.
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| 163 | */
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| 164 | s->hit = 1;
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| 165 | st->hand_state = TLS_ST_CR_CHANGE;
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| 166 | return 1;
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| 167 | } else if (!(s->s3->tmp.new_cipher->algorithm_auth
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| 168 | & (SSL_aNULL | SSL_aSRP | SSL_aPSK))) {
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| 169 | if (mt == SSL3_MT_CERTIFICATE) {
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| 170 | st->hand_state = TLS_ST_CR_CERT;
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| 171 | return 1;
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| 172 | }
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| 173 | } else {
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| 174 | ske_expected = key_exchange_expected(s);
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| 175 | /* SKE is optional for some PSK ciphersuites */
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| 176 | if (ske_expected
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| 177 | || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK)
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| 178 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) {
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| 179 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) {
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| 180 | st->hand_state = TLS_ST_CR_KEY_EXCH;
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| 181 | return 1;
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| 182 | }
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| 183 | } else if (mt == SSL3_MT_CERTIFICATE_REQUEST
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| 184 | && cert_req_allowed(s)) {
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| 185 | st->hand_state = TLS_ST_CR_CERT_REQ;
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| 186 | return 1;
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| 187 | } else if (mt == SSL3_MT_SERVER_DONE) {
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| 188 | st->hand_state = TLS_ST_CR_SRVR_DONE;
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| 189 | return 1;
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| 190 | }
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| 191 | }
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| 192 | }
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| 193 | break;
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| 194 |
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| 195 | case TLS_ST_CR_CERT:
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| 196 | /*
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| 197 | * The CertificateStatus message is optional even if
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| 198 | * |tlsext_status_expected| is set
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| 199 | */
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| 200 | if (s->tlsext_status_expected && mt == SSL3_MT_CERTIFICATE_STATUS) {
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| 201 | st->hand_state = TLS_ST_CR_CERT_STATUS;
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| 202 | return 1;
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| 203 | }
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| 204 | /* Fall through */
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| 205 |
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| 206 | case TLS_ST_CR_CERT_STATUS:
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| 207 | ske_expected = key_exchange_expected(s);
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| 208 | /* SKE is optional for some PSK ciphersuites */
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| 209 | if (ske_expected || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK)
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| 210 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) {
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| 211 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) {
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| 212 | st->hand_state = TLS_ST_CR_KEY_EXCH;
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| 213 | return 1;
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| 214 | }
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| 215 | goto err;
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| 216 | }
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| 217 | /* Fall through */
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| 218 |
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| 219 | case TLS_ST_CR_KEY_EXCH:
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| 220 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) {
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| 221 | if (cert_req_allowed(s)) {
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| 222 | st->hand_state = TLS_ST_CR_CERT_REQ;
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| 223 | return 1;
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| 224 | }
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| 225 | goto err;
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| 226 | }
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| 227 | /* Fall through */
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| 228 |
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| 229 | case TLS_ST_CR_CERT_REQ:
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| 230 | if (mt == SSL3_MT_SERVER_DONE) {
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| 231 | st->hand_state = TLS_ST_CR_SRVR_DONE;
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| 232 | return 1;
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| 233 | }
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| 234 | break;
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| 235 |
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| 236 | case TLS_ST_CW_FINISHED:
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| 237 | if (s->tlsext_ticket_expected) {
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| 238 | if (mt == SSL3_MT_NEWSESSION_TICKET) {
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| 239 | st->hand_state = TLS_ST_CR_SESSION_TICKET;
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| 240 | return 1;
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| 241 | }
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| 242 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
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| 243 | st->hand_state = TLS_ST_CR_CHANGE;
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| 244 | return 1;
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| 245 | }
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| 246 | break;
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| 247 |
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| 248 | case TLS_ST_CR_SESSION_TICKET:
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| 249 | if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
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| 250 | st->hand_state = TLS_ST_CR_CHANGE;
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| 251 | return 1;
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| 252 | }
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| 253 | break;
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| 254 |
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| 255 | case TLS_ST_CR_CHANGE:
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| 256 | if (mt == SSL3_MT_FINISHED) {
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| 257 | st->hand_state = TLS_ST_CR_FINISHED;
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| 258 | return 1;
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| 259 | }
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| 260 | break;
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| 261 |
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| 262 | default:
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| 263 | break;
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| 264 | }
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| 265 |
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| 266 | err:
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| 267 | /* No valid transition found */
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| 268 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL3_AD_UNEXPECTED_MESSAGE);
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| 269 | SSLerr(SSL_F_OSSL_STATEM_CLIENT_READ_TRANSITION, SSL_R_UNEXPECTED_MESSAGE);
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| 270 | return 0;
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| 271 | }
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| 272 |
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| 273 | /*
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| 274 | * client_write_transition() works out what handshake state to move to next
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| 275 | * when the client is writing messages to be sent to the server.
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| 276 | */
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| 277 | WRITE_TRAN ossl_statem_client_write_transition(SSL *s)
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| 278 | {
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| 279 | OSSL_STATEM *st = &s->statem;
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| 280 |
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| 281 | switch (st->hand_state) {
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| 282 | case TLS_ST_OK:
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| 283 | /* Renegotiation - fall through */
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| 284 | case TLS_ST_BEFORE:
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| 285 | st->hand_state = TLS_ST_CW_CLNT_HELLO;
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| 286 | return WRITE_TRAN_CONTINUE;
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| 287 |
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| 288 | case TLS_ST_CW_CLNT_HELLO:
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| 289 | /*
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| 290 | * No transition at the end of writing because we don't know what
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| 291 | * we will be sent
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| 292 | */
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| 293 | return WRITE_TRAN_FINISHED;
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| 294 |
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| 295 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
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| 296 | st->hand_state = TLS_ST_CW_CLNT_HELLO;
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| 297 | return WRITE_TRAN_CONTINUE;
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| 298 |
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| 299 | case TLS_ST_CR_SRVR_DONE:
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| 300 | if (s->s3->tmp.cert_req)
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| 301 | st->hand_state = TLS_ST_CW_CERT;
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| 302 | else
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| 303 | st->hand_state = TLS_ST_CW_KEY_EXCH;
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| 304 | return WRITE_TRAN_CONTINUE;
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| 305 |
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| 306 | case TLS_ST_CW_CERT:
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| 307 | st->hand_state = TLS_ST_CW_KEY_EXCH;
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| 308 | return WRITE_TRAN_CONTINUE;
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| 309 |
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| 310 | case TLS_ST_CW_KEY_EXCH:
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| 311 | /*
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| 312 | * For TLS, cert_req is set to 2, so a cert chain of nothing is
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| 313 | * sent, but no verify packet is sent
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| 314 | */
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| 315 | /*
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| 316 | * XXX: For now, we do not support client authentication in ECDH
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| 317 | * cipher suites with ECDH (rather than ECDSA) certificates. We
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| 318 | * need to skip the certificate verify message when client's
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| 319 | * ECDH public key is sent inside the client certificate.
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| 320 | */
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| 321 | if (s->s3->tmp.cert_req == 1) {
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| 322 | st->hand_state = TLS_ST_CW_CERT_VRFY;
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| 323 | } else {
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| 324 | st->hand_state = TLS_ST_CW_CHANGE;
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| 325 | }
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| 326 | if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) {
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| 327 | st->hand_state = TLS_ST_CW_CHANGE;
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| 328 | }
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| 329 | return WRITE_TRAN_CONTINUE;
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| 330 |
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| 331 | case TLS_ST_CW_CERT_VRFY:
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| 332 | st->hand_state = TLS_ST_CW_CHANGE;
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| 333 | return WRITE_TRAN_CONTINUE;
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| 334 |
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| 335 | case TLS_ST_CW_CHANGE:
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| 336 | #if defined(OPENSSL_NO_NEXTPROTONEG)
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| 337 | st->hand_state = TLS_ST_CW_FINISHED;
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| 338 | #else
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| 339 | if (!SSL_IS_DTLS(s) && s->s3->next_proto_neg_seen)
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| 340 | st->hand_state = TLS_ST_CW_NEXT_PROTO;
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| 341 | else
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| 342 | st->hand_state = TLS_ST_CW_FINISHED;
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| 343 | #endif
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| 344 | return WRITE_TRAN_CONTINUE;
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| 345 |
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| 346 | #if !defined(OPENSSL_NO_NEXTPROTONEG)
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| 347 | case TLS_ST_CW_NEXT_PROTO:
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| 348 | st->hand_state = TLS_ST_CW_FINISHED;
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| 349 | return WRITE_TRAN_CONTINUE;
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| 350 | #endif
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| 351 |
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| 352 | case TLS_ST_CW_FINISHED:
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| 353 | if (s->hit) {
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| 354 | st->hand_state = TLS_ST_OK;
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| 355 | ossl_statem_set_in_init(s, 0);
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| 356 | return WRITE_TRAN_CONTINUE;
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| 357 | } else {
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| 358 | return WRITE_TRAN_FINISHED;
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| 359 | }
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| 360 |
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| 361 | case TLS_ST_CR_FINISHED:
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| 362 | if (s->hit) {
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| 363 | st->hand_state = TLS_ST_CW_CHANGE;
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| 364 | return WRITE_TRAN_CONTINUE;
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| 365 | } else {
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| 366 | st->hand_state = TLS_ST_OK;
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| 367 | ossl_statem_set_in_init(s, 0);
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| 368 | return WRITE_TRAN_CONTINUE;
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| 369 | }
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| 370 |
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| 371 | default:
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| 372 | /* Shouldn't happen */
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| 373 | return WRITE_TRAN_ERROR;
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| 374 | }
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| 375 | }
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| 376 |
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| 377 | /*
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| 378 | * Perform any pre work that needs to be done prior to sending a message from
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| 379 | * the client to the server.
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| 380 | */
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| 381 | WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst)
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| 382 | {
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| 383 | OSSL_STATEM *st = &s->statem;
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| 384 |
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| 385 | switch (st->hand_state) {
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| 386 | case TLS_ST_CW_CLNT_HELLO:
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| 387 | s->shutdown = 0;
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| 388 | if (SSL_IS_DTLS(s)) {
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| 389 | /* every DTLS ClientHello resets Finished MAC */
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| 390 | if (!ssl3_init_finished_mac(s)) {
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| 391 | ossl_statem_set_error(s);
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| 392 | return WORK_ERROR;
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| 393 | }
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| 394 | }
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| 395 | break;
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| 396 |
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| 397 | case TLS_ST_CW_CHANGE:
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| 398 | if (SSL_IS_DTLS(s)) {
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| 399 | if (s->hit) {
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| 400 | /*
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| 401 | * We're into the last flight so we don't retransmit these
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| 402 | * messages unless we need to.
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| 403 | */
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| 404 | st->use_timer = 0;
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| 405 | }
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| 406 | #ifndef OPENSSL_NO_SCTP
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| 407 | if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
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| 408 | return dtls_wait_for_dry(s);
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| 409 | #endif
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| 410 | }
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| 411 | return WORK_FINISHED_CONTINUE;
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| 412 |
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| 413 | case TLS_ST_OK:
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| 414 | return tls_finish_handshake(s, wst);
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| 415 |
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| 416 | default:
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| 417 | /* No pre work to be done */
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| 418 | break;
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| 419 | }
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| 420 |
|
---|
| 421 | return WORK_FINISHED_CONTINUE;
|
---|
| 422 | }
|
---|
| 423 |
|
---|
| 424 | /*
|
---|
| 425 | * Perform any work that needs to be done after sending a message from the
|
---|
| 426 | * client to the server.
|
---|
| 427 | */
|
---|
| 428 | WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst)
|
---|
| 429 | {
|
---|
| 430 | OSSL_STATEM *st = &s->statem;
|
---|
| 431 |
|
---|
| 432 | s->init_num = 0;
|
---|
| 433 |
|
---|
| 434 | switch (st->hand_state) {
|
---|
| 435 | case TLS_ST_CW_CLNT_HELLO:
|
---|
| 436 | if (wst == WORK_MORE_A && statem_flush(s) != 1)
|
---|
| 437 | return WORK_MORE_A;
|
---|
| 438 |
|
---|
| 439 | if (SSL_IS_DTLS(s)) {
|
---|
| 440 | /* Treat the next message as the first packet */
|
---|
| 441 | s->first_packet = 1;
|
---|
| 442 | }
|
---|
| 443 | break;
|
---|
| 444 |
|
---|
| 445 | case TLS_ST_CW_KEY_EXCH:
|
---|
| 446 | if (tls_client_key_exchange_post_work(s) == 0)
|
---|
| 447 | return WORK_ERROR;
|
---|
| 448 | break;
|
---|
| 449 |
|
---|
| 450 | case TLS_ST_CW_CHANGE:
|
---|
| 451 | s->session->cipher = s->s3->tmp.new_cipher;
|
---|
| 452 | #ifdef OPENSSL_NO_COMP
|
---|
| 453 | s->session->compress_meth = 0;
|
---|
| 454 | #else
|
---|
| 455 | if (s->s3->tmp.new_compression == NULL)
|
---|
| 456 | s->session->compress_meth = 0;
|
---|
| 457 | else
|
---|
| 458 | s->session->compress_meth = s->s3->tmp.new_compression->id;
|
---|
| 459 | #endif
|
---|
| 460 | if (!s->method->ssl3_enc->setup_key_block(s))
|
---|
| 461 | return WORK_ERROR;
|
---|
| 462 |
|
---|
| 463 | if (!s->method->ssl3_enc->change_cipher_state(s,
|
---|
| 464 | SSL3_CHANGE_CIPHER_CLIENT_WRITE))
|
---|
| 465 | return WORK_ERROR;
|
---|
| 466 |
|
---|
| 467 | if (SSL_IS_DTLS(s)) {
|
---|
| 468 | #ifndef OPENSSL_NO_SCTP
|
---|
| 469 | if (s->hit) {
|
---|
| 470 | /*
|
---|
| 471 | * Change to new shared key of SCTP-Auth, will be ignored if
|
---|
| 472 | * no SCTP used.
|
---|
| 473 | */
|
---|
| 474 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY,
|
---|
| 475 | 0, NULL);
|
---|
| 476 | }
|
---|
| 477 | #endif
|
---|
| 478 |
|
---|
| 479 | dtls1_reset_seq_numbers(s, SSL3_CC_WRITE);
|
---|
| 480 | }
|
---|
| 481 | break;
|
---|
| 482 |
|
---|
| 483 | case TLS_ST_CW_FINISHED:
|
---|
| 484 | #ifndef OPENSSL_NO_SCTP
|
---|
| 485 | if (wst == WORK_MORE_A && SSL_IS_DTLS(s) && s->hit == 0) {
|
---|
| 486 | /*
|
---|
| 487 | * Change to new shared key of SCTP-Auth, will be ignored if
|
---|
| 488 | * no SCTP used.
|
---|
| 489 | */
|
---|
| 490 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY,
|
---|
| 491 | 0, NULL);
|
---|
| 492 | }
|
---|
| 493 | #endif
|
---|
| 494 | if (statem_flush(s) != 1)
|
---|
| 495 | return WORK_MORE_B;
|
---|
| 496 | break;
|
---|
| 497 |
|
---|
| 498 | default:
|
---|
| 499 | /* No post work to be done */
|
---|
| 500 | break;
|
---|
| 501 | }
|
---|
| 502 |
|
---|
| 503 | return WORK_FINISHED_CONTINUE;
|
---|
| 504 | }
|
---|
| 505 |
|
---|
| 506 | /*
|
---|
| 507 | * Construct a message to be sent from the client to the server.
|
---|
| 508 | *
|
---|
| 509 | * Valid return values are:
|
---|
| 510 | * 1: Success
|
---|
| 511 | * 0: Error
|
---|
| 512 | */
|
---|
| 513 | int ossl_statem_client_construct_message(SSL *s)
|
---|
| 514 | {
|
---|
| 515 | OSSL_STATEM *st = &s->statem;
|
---|
| 516 |
|
---|
| 517 | switch (st->hand_state) {
|
---|
| 518 | case TLS_ST_CW_CLNT_HELLO:
|
---|
| 519 | return tls_construct_client_hello(s);
|
---|
| 520 |
|
---|
| 521 | case TLS_ST_CW_CERT:
|
---|
| 522 | return tls_construct_client_certificate(s);
|
---|
| 523 |
|
---|
| 524 | case TLS_ST_CW_KEY_EXCH:
|
---|
| 525 | return tls_construct_client_key_exchange(s);
|
---|
| 526 |
|
---|
| 527 | case TLS_ST_CW_CERT_VRFY:
|
---|
| 528 | return tls_construct_client_verify(s);
|
---|
| 529 |
|
---|
| 530 | case TLS_ST_CW_CHANGE:
|
---|
| 531 | if (SSL_IS_DTLS(s))
|
---|
| 532 | return dtls_construct_change_cipher_spec(s);
|
---|
| 533 | else
|
---|
| 534 | return tls_construct_change_cipher_spec(s);
|
---|
| 535 |
|
---|
| 536 | #if !defined(OPENSSL_NO_NEXTPROTONEG)
|
---|
| 537 | case TLS_ST_CW_NEXT_PROTO:
|
---|
| 538 | return tls_construct_next_proto(s);
|
---|
| 539 | #endif
|
---|
| 540 | case TLS_ST_CW_FINISHED:
|
---|
| 541 | return tls_construct_finished(s,
|
---|
| 542 | s->method->
|
---|
| 543 | ssl3_enc->client_finished_label,
|
---|
| 544 | s->method->
|
---|
| 545 | ssl3_enc->client_finished_label_len);
|
---|
| 546 |
|
---|
| 547 | default:
|
---|
| 548 | /* Shouldn't happen */
|
---|
| 549 | break;
|
---|
| 550 | }
|
---|
| 551 |
|
---|
| 552 | return 0;
|
---|
| 553 | }
|
---|
| 554 |
|
---|
| 555 | /*
|
---|
| 556 | * Returns the maximum allowed length for the current message that we are
|
---|
| 557 | * reading. Excludes the message header.
|
---|
| 558 | */
|
---|
| 559 | unsigned long ossl_statem_client_max_message_size(SSL *s)
|
---|
| 560 | {
|
---|
| 561 | OSSL_STATEM *st = &s->statem;
|
---|
| 562 |
|
---|
| 563 | switch (st->hand_state) {
|
---|
| 564 | case TLS_ST_CR_SRVR_HELLO:
|
---|
| 565 | return SERVER_HELLO_MAX_LENGTH;
|
---|
| 566 |
|
---|
| 567 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
|
---|
| 568 | return HELLO_VERIFY_REQUEST_MAX_LENGTH;
|
---|
| 569 |
|
---|
| 570 | case TLS_ST_CR_CERT:
|
---|
| 571 | return s->max_cert_list;
|
---|
| 572 |
|
---|
| 573 | case TLS_ST_CR_CERT_STATUS:
|
---|
| 574 | return SSL3_RT_MAX_PLAIN_LENGTH;
|
---|
| 575 |
|
---|
| 576 | case TLS_ST_CR_KEY_EXCH:
|
---|
| 577 | return SERVER_KEY_EXCH_MAX_LENGTH;
|
---|
| 578 |
|
---|
| 579 | case TLS_ST_CR_CERT_REQ:
|
---|
| 580 | /*
|
---|
| 581 | * Set to s->max_cert_list for compatibility with previous releases. In
|
---|
| 582 | * practice these messages can get quite long if servers are configured
|
---|
| 583 | * to provide a long list of acceptable CAs
|
---|
| 584 | */
|
---|
| 585 | return s->max_cert_list;
|
---|
| 586 |
|
---|
| 587 | case TLS_ST_CR_SRVR_DONE:
|
---|
| 588 | return SERVER_HELLO_DONE_MAX_LENGTH;
|
---|
| 589 |
|
---|
| 590 | case TLS_ST_CR_CHANGE:
|
---|
| 591 | if (s->version == DTLS1_BAD_VER)
|
---|
| 592 | return 3;
|
---|
| 593 | return CCS_MAX_LENGTH;
|
---|
| 594 |
|
---|
| 595 | case TLS_ST_CR_SESSION_TICKET:
|
---|
| 596 | return SSL3_RT_MAX_PLAIN_LENGTH;
|
---|
| 597 |
|
---|
| 598 | case TLS_ST_CR_FINISHED:
|
---|
| 599 | return FINISHED_MAX_LENGTH;
|
---|
| 600 |
|
---|
| 601 | default:
|
---|
| 602 | /* Shouldn't happen */
|
---|
| 603 | break;
|
---|
| 604 | }
|
---|
| 605 |
|
---|
| 606 | return 0;
|
---|
| 607 | }
|
---|
| 608 |
|
---|
| 609 | /*
|
---|
| 610 | * Process a message that the client has been received from the server.
|
---|
| 611 | */
|
---|
| 612 | MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt)
|
---|
| 613 | {
|
---|
| 614 | OSSL_STATEM *st = &s->statem;
|
---|
| 615 |
|
---|
| 616 | switch (st->hand_state) {
|
---|
| 617 | case TLS_ST_CR_SRVR_HELLO:
|
---|
| 618 | return tls_process_server_hello(s, pkt);
|
---|
| 619 |
|
---|
| 620 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
|
---|
| 621 | return dtls_process_hello_verify(s, pkt);
|
---|
| 622 |
|
---|
| 623 | case TLS_ST_CR_CERT:
|
---|
| 624 | return tls_process_server_certificate(s, pkt);
|
---|
| 625 |
|
---|
| 626 | case TLS_ST_CR_CERT_STATUS:
|
---|
| 627 | return tls_process_cert_status(s, pkt);
|
---|
| 628 |
|
---|
| 629 | case TLS_ST_CR_KEY_EXCH:
|
---|
| 630 | return tls_process_key_exchange(s, pkt);
|
---|
| 631 |
|
---|
| 632 | case TLS_ST_CR_CERT_REQ:
|
---|
| 633 | return tls_process_certificate_request(s, pkt);
|
---|
| 634 |
|
---|
| 635 | case TLS_ST_CR_SRVR_DONE:
|
---|
| 636 | return tls_process_server_done(s, pkt);
|
---|
| 637 |
|
---|
| 638 | case TLS_ST_CR_CHANGE:
|
---|
| 639 | return tls_process_change_cipher_spec(s, pkt);
|
---|
| 640 |
|
---|
| 641 | case TLS_ST_CR_SESSION_TICKET:
|
---|
| 642 | return tls_process_new_session_ticket(s, pkt);
|
---|
| 643 |
|
---|
| 644 | case TLS_ST_CR_FINISHED:
|
---|
| 645 | return tls_process_finished(s, pkt);
|
---|
| 646 |
|
---|
| 647 | default:
|
---|
| 648 | /* Shouldn't happen */
|
---|
| 649 | break;
|
---|
| 650 | }
|
---|
| 651 |
|
---|
| 652 | return MSG_PROCESS_ERROR;
|
---|
| 653 | }
|
---|
| 654 |
|
---|
| 655 | /*
|
---|
| 656 | * Perform any further processing required following the receipt of a message
|
---|
| 657 | * from the server
|
---|
| 658 | */
|
---|
| 659 | WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst)
|
---|
| 660 | {
|
---|
| 661 | OSSL_STATEM *st = &s->statem;
|
---|
| 662 |
|
---|
| 663 | switch (st->hand_state) {
|
---|
| 664 | case TLS_ST_CR_CERT_REQ:
|
---|
| 665 | return tls_prepare_client_certificate(s, wst);
|
---|
| 666 |
|
---|
| 667 | #ifndef OPENSSL_NO_SCTP
|
---|
| 668 | case TLS_ST_CR_SRVR_DONE:
|
---|
| 669 | /* We only get here if we are using SCTP and we are renegotiating */
|
---|
| 670 | if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) {
|
---|
| 671 | s->s3->in_read_app_data = 2;
|
---|
| 672 | s->rwstate = SSL_READING;
|
---|
| 673 | BIO_clear_retry_flags(SSL_get_rbio(s));
|
---|
| 674 | BIO_set_retry_read(SSL_get_rbio(s));
|
---|
| 675 | ossl_statem_set_sctp_read_sock(s, 1);
|
---|
| 676 | return WORK_MORE_A;
|
---|
| 677 | }
|
---|
| 678 | ossl_statem_set_sctp_read_sock(s, 0);
|
---|
| 679 | return WORK_FINISHED_STOP;
|
---|
| 680 | #endif
|
---|
| 681 |
|
---|
| 682 | default:
|
---|
| 683 | break;
|
---|
| 684 | }
|
---|
| 685 |
|
---|
| 686 | /* Shouldn't happen */
|
---|
| 687 | return WORK_ERROR;
|
---|
| 688 | }
|
---|
| 689 |
|
---|
| 690 | int tls_construct_client_hello(SSL *s)
|
---|
| 691 | {
|
---|
| 692 | unsigned char *buf;
|
---|
| 693 | unsigned char *p, *d;
|
---|
| 694 | int i;
|
---|
| 695 | int protverr;
|
---|
| 696 | unsigned long l;
|
---|
| 697 | int al = 0;
|
---|
| 698 | #ifndef OPENSSL_NO_COMP
|
---|
| 699 | int j;
|
---|
| 700 | SSL_COMP *comp;
|
---|
| 701 | #endif
|
---|
| 702 | SSL_SESSION *sess = s->session;
|
---|
| 703 |
|
---|
| 704 | buf = (unsigned char *)s->init_buf->data;
|
---|
| 705 |
|
---|
| 706 | /* Work out what SSL/TLS/DTLS version to use */
|
---|
| 707 | protverr = ssl_set_client_hello_version(s);
|
---|
| 708 | if (protverr != 0) {
|
---|
| 709 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, protverr);
|
---|
| 710 | goto err;
|
---|
| 711 | }
|
---|
| 712 |
|
---|
| 713 | if ((sess == NULL) || !ssl_version_supported(s, sess->ssl_version) ||
|
---|
| 714 | /*
|
---|
| 715 | * In the case of EAP-FAST, we can have a pre-shared
|
---|
| 716 | * "ticket" without a session ID.
|
---|
| 717 | */
|
---|
| 718 | (!sess->session_id_length && !sess->tlsext_tick) ||
|
---|
| 719 | (sess->not_resumable)) {
|
---|
| 720 | if (!ssl_get_new_session(s, 0))
|
---|
| 721 | goto err;
|
---|
| 722 | }
|
---|
| 723 | /* else use the pre-loaded session */
|
---|
| 724 |
|
---|
| 725 | p = s->s3->client_random;
|
---|
| 726 |
|
---|
| 727 | /*
|
---|
| 728 | * for DTLS if client_random is initialized, reuse it, we are
|
---|
| 729 | * required to use same upon reply to HelloVerify
|
---|
| 730 | */
|
---|
| 731 | if (SSL_IS_DTLS(s)) {
|
---|
| 732 | size_t idx;
|
---|
| 733 | i = 1;
|
---|
| 734 | for (idx = 0; idx < sizeof(s->s3->client_random); idx++) {
|
---|
| 735 | if (p[idx]) {
|
---|
| 736 | i = 0;
|
---|
| 737 | break;
|
---|
| 738 | }
|
---|
| 739 | }
|
---|
| 740 | } else
|
---|
| 741 | i = 1;
|
---|
| 742 |
|
---|
| 743 | if (i && ssl_fill_hello_random(s, 0, p, sizeof(s->s3->client_random)) <= 0)
|
---|
| 744 | goto err;
|
---|
| 745 |
|
---|
| 746 | /* Do the message type and length last */
|
---|
| 747 | d = p = ssl_handshake_start(s);
|
---|
| 748 |
|
---|
| 749 | /*-
|
---|
| 750 | * version indicates the negotiated version: for example from
|
---|
| 751 | * an SSLv2/v3 compatible client hello). The client_version
|
---|
| 752 | * field is the maximum version we permit and it is also
|
---|
| 753 | * used in RSA encrypted premaster secrets. Some servers can
|
---|
| 754 | * choke if we initially report a higher version then
|
---|
| 755 | * renegotiate to a lower one in the premaster secret. This
|
---|
| 756 | * didn't happen with TLS 1.0 as most servers supported it
|
---|
| 757 | * but it can with TLS 1.1 or later if the server only supports
|
---|
| 758 | * 1.0.
|
---|
| 759 | *
|
---|
| 760 | * Possible scenario with previous logic:
|
---|
| 761 | * 1. Client hello indicates TLS 1.2
|
---|
| 762 | * 2. Server hello says TLS 1.0
|
---|
| 763 | * 3. RSA encrypted premaster secret uses 1.2.
|
---|
| 764 | * 4. Handshake proceeds using TLS 1.0.
|
---|
| 765 | * 5. Server sends hello request to renegotiate.
|
---|
| 766 | * 6. Client hello indicates TLS v1.0 as we now
|
---|
| 767 | * know that is maximum server supports.
|
---|
| 768 | * 7. Server chokes on RSA encrypted premaster secret
|
---|
| 769 | * containing version 1.0.
|
---|
| 770 | *
|
---|
| 771 | * For interoperability it should be OK to always use the
|
---|
| 772 | * maximum version we support in client hello and then rely
|
---|
| 773 | * on the checking of version to ensure the servers isn't
|
---|
| 774 | * being inconsistent: for example initially negotiating with
|
---|
| 775 | * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
|
---|
| 776 | * client_version in client hello and not resetting it to
|
---|
| 777 | * the negotiated version.
|
---|
| 778 | */
|
---|
| 779 | *(p++) = s->client_version >> 8;
|
---|
| 780 | *(p++) = s->client_version & 0xff;
|
---|
| 781 |
|
---|
| 782 | /* Random stuff */
|
---|
| 783 | memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
|
---|
| 784 | p += SSL3_RANDOM_SIZE;
|
---|
| 785 |
|
---|
| 786 | /* Session ID */
|
---|
| 787 | if (s->new_session)
|
---|
| 788 | i = 0;
|
---|
| 789 | else
|
---|
| 790 | i = s->session->session_id_length;
|
---|
| 791 | *(p++) = i;
|
---|
| 792 | if (i != 0) {
|
---|
| 793 | if (i > (int)sizeof(s->session->session_id)) {
|
---|
| 794 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
|
---|
| 795 | goto err;
|
---|
| 796 | }
|
---|
| 797 | memcpy(p, s->session->session_id, i);
|
---|
| 798 | p += i;
|
---|
| 799 | }
|
---|
| 800 |
|
---|
| 801 | /* cookie stuff for DTLS */
|
---|
| 802 | if (SSL_IS_DTLS(s)) {
|
---|
| 803 | if (s->d1->cookie_len > sizeof(s->d1->cookie)) {
|
---|
| 804 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
|
---|
| 805 | goto err;
|
---|
| 806 | }
|
---|
| 807 | *(p++) = s->d1->cookie_len;
|
---|
| 808 | memcpy(p, s->d1->cookie, s->d1->cookie_len);
|
---|
| 809 | p += s->d1->cookie_len;
|
---|
| 810 | }
|
---|
| 811 |
|
---|
| 812 | /* Ciphers supported */
|
---|
| 813 | i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2]));
|
---|
| 814 | if (i == 0) {
|
---|
| 815 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE);
|
---|
| 816 | goto err;
|
---|
| 817 | }
|
---|
| 818 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
|
---|
| 819 | /*
|
---|
| 820 | * Some servers hang if client hello > 256 bytes as hack workaround
|
---|
| 821 | * chop number of supported ciphers to keep it well below this if we
|
---|
| 822 | * use TLS v1.2
|
---|
| 823 | */
|
---|
| 824 | if (TLS1_get_version(s) >= TLS1_2_VERSION
|
---|
| 825 | && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
|
---|
| 826 | i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
|
---|
| 827 | #endif
|
---|
| 828 | s2n(i, p);
|
---|
| 829 | p += i;
|
---|
| 830 |
|
---|
| 831 | /* COMPRESSION */
|
---|
| 832 | #ifdef OPENSSL_NO_COMP
|
---|
| 833 | *(p++) = 1;
|
---|
| 834 | #else
|
---|
| 835 |
|
---|
| 836 | if (!ssl_allow_compression(s) || !s->ctx->comp_methods)
|
---|
| 837 | j = 0;
|
---|
| 838 | else
|
---|
| 839 | j = sk_SSL_COMP_num(s->ctx->comp_methods);
|
---|
| 840 | *(p++) = 1 + j;
|
---|
| 841 | for (i = 0; i < j; i++) {
|
---|
| 842 | comp = sk_SSL_COMP_value(s->ctx->comp_methods, i);
|
---|
| 843 | *(p++) = comp->id;
|
---|
| 844 | }
|
---|
| 845 | #endif
|
---|
| 846 | *(p++) = 0; /* Add the NULL method */
|
---|
| 847 |
|
---|
| 848 | /* TLS extensions */
|
---|
| 849 | if (ssl_prepare_clienthello_tlsext(s) <= 0) {
|
---|
| 850 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT);
|
---|
| 851 | goto err;
|
---|
| 852 | }
|
---|
| 853 | if ((p =
|
---|
| 854 | ssl_add_clienthello_tlsext(s, p, buf + SSL3_RT_MAX_PLAIN_LENGTH,
|
---|
| 855 | &al)) == NULL) {
|
---|
| 856 | ssl3_send_alert(s, SSL3_AL_FATAL, al);
|
---|
| 857 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
|
---|
| 858 | goto err;
|
---|
| 859 | }
|
---|
| 860 |
|
---|
| 861 | l = p - d;
|
---|
| 862 | if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l)) {
|
---|
| 863 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
|
---|
| 864 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
|
---|
| 865 | goto err;
|
---|
| 866 | }
|
---|
| 867 |
|
---|
| 868 | return 1;
|
---|
| 869 | err:
|
---|
| 870 | ossl_statem_set_error(s);
|
---|
| 871 | return 0;
|
---|
| 872 | }
|
---|
| 873 |
|
---|
| 874 | MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt)
|
---|
| 875 | {
|
---|
| 876 | int al;
|
---|
| 877 | unsigned int cookie_len;
|
---|
| 878 | PACKET cookiepkt;
|
---|
| 879 |
|
---|
| 880 | if (!PACKET_forward(pkt, 2)
|
---|
| 881 | || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) {
|
---|
| 882 | al = SSL_AD_DECODE_ERROR;
|
---|
| 883 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH);
|
---|
| 884 | goto f_err;
|
---|
| 885 | }
|
---|
| 886 |
|
---|
| 887 | cookie_len = PACKET_remaining(&cookiepkt);
|
---|
| 888 | if (cookie_len > sizeof(s->d1->cookie)) {
|
---|
| 889 | al = SSL_AD_ILLEGAL_PARAMETER;
|
---|
| 890 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_TOO_LONG);
|
---|
| 891 | goto f_err;
|
---|
| 892 | }
|
---|
| 893 |
|
---|
| 894 | if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) {
|
---|
| 895 | al = SSL_AD_DECODE_ERROR;
|
---|
| 896 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH);
|
---|
| 897 | goto f_err;
|
---|
| 898 | }
|
---|
| 899 | s->d1->cookie_len = cookie_len;
|
---|
| 900 |
|
---|
| 901 | return MSG_PROCESS_FINISHED_READING;
|
---|
| 902 | f_err:
|
---|
| 903 | ssl3_send_alert(s, SSL3_AL_FATAL, al);
|
---|
| 904 | ossl_statem_set_error(s);
|
---|
| 905 | return MSG_PROCESS_ERROR;
|
---|
| 906 | }
|
---|
| 907 |
|
---|
| 908 | MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt)
|
---|
| 909 | {
|
---|
| 910 | STACK_OF(SSL_CIPHER) *sk;
|
---|
| 911 | const SSL_CIPHER *c;
|
---|
| 912 | PACKET session_id;
|
---|
| 913 | size_t session_id_len;
|
---|
| 914 | const unsigned char *cipherchars;
|
---|
| 915 | int i, al = SSL_AD_INTERNAL_ERROR;
|
---|
| 916 | unsigned int compression;
|
---|
| 917 | unsigned int sversion;
|
---|
| 918 | int protverr;
|
---|
| 919 | #ifndef OPENSSL_NO_COMP
|
---|
| 920 | SSL_COMP *comp;
|
---|
| 921 | #endif
|
---|
| 922 |
|
---|
| 923 | if (!PACKET_get_net_2(pkt, &sversion)) {
|
---|
| 924 | al = SSL_AD_DECODE_ERROR;
|
---|
| 925 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
|
---|
| 926 | goto f_err;
|
---|
| 927 | }
|
---|
| 928 |
|
---|
| 929 | protverr = ssl_choose_client_version(s, sversion);
|
---|
| 930 | if (protverr != 0) {
|
---|
| 931 | al = SSL_AD_PROTOCOL_VERSION;
|
---|
| 932 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, protverr);
|
---|
| 933 | goto f_err;
|
---|
| 934 | }
|
---|
| 935 |
|
---|
| 936 | /* load the server hello data */
|
---|
| 937 | /* load the server random */
|
---|
| 938 | if (!PACKET_copy_bytes(pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) {
|
---|
| 939 | al = SSL_AD_DECODE_ERROR;
|
---|
| 940 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
|
---|
| 941 | goto f_err;
|
---|
| 942 | }
|
---|
| 943 |
|
---|
| 944 | s->hit = 0;
|
---|
| 945 |
|
---|
| 946 | /* Get the session-id. */
|
---|
| 947 | if (!PACKET_get_length_prefixed_1(pkt, &session_id)) {
|
---|
| 948 | al = SSL_AD_DECODE_ERROR;
|
---|
| 949 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
|
---|
| 950 | goto f_err;
|
---|
| 951 | }
|
---|
| 952 | session_id_len = PACKET_remaining(&session_id);
|
---|
| 953 | if (session_id_len > sizeof s->session->session_id
|
---|
| 954 | || session_id_len > SSL3_SESSION_ID_SIZE) {
|
---|
| 955 | al = SSL_AD_ILLEGAL_PARAMETER;
|
---|
| 956 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_SSL3_SESSION_ID_TOO_LONG);
|
---|
| 957 | goto f_err;
|
---|
| 958 | }
|
---|
| 959 |
|
---|
| 960 | if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) {
|
---|
| 961 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
|
---|
| 962 | al = SSL_AD_DECODE_ERROR;
|
---|
| 963 | goto f_err;
|
---|
| 964 | }
|
---|
| 965 |
|
---|
| 966 | /*
|
---|
| 967 | * Check if we can resume the session based on external pre-shared secret.
|
---|
| 968 | * EAP-FAST (RFC 4851) supports two types of session resumption.
|
---|
| 969 | * Resumption based on server-side state works with session IDs.
|
---|
| 970 | * Resumption based on pre-shared Protected Access Credentials (PACs)
|
---|
| 971 | * works by overriding the SessionTicket extension at the application
|
---|
| 972 | * layer, and does not send a session ID. (We do not know whether EAP-FAST
|
---|
| 973 | * servers would honour the session ID.) Therefore, the session ID alone
|
---|
| 974 | * is not a reliable indicator of session resumption, so we first check if
|
---|
| 975 | * we can resume, and later peek at the next handshake message to see if the
|
---|
| 976 | * server wants to resume.
|
---|
| 977 | */
|
---|
| 978 | if (s->version >= TLS1_VERSION && s->tls_session_secret_cb &&
|
---|
| 979 | s->session->tlsext_tick) {
|
---|
| 980 | const SSL_CIPHER *pref_cipher = NULL;
|
---|
| 981 | s->session->master_key_length = sizeof(s->session->master_key);
|
---|
| 982 | if (s->tls_session_secret_cb(s, s->session->master_key,
|
---|
| 983 | &s->session->master_key_length,
|
---|
| 984 | NULL, &pref_cipher,
|
---|
| 985 | s->tls_session_secret_cb_arg)) {
|
---|
| 986 | s->session->cipher = pref_cipher ?
|
---|
| 987 | pref_cipher : ssl_get_cipher_by_char(s, cipherchars);
|
---|
| 988 | } else {
|
---|
| 989 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
|
---|
| 990 | al = SSL_AD_INTERNAL_ERROR;
|
---|
| 991 | goto f_err;
|
---|
| 992 | }
|
---|
| 993 | }
|
---|
| 994 |
|
---|
| 995 | if (session_id_len != 0 && session_id_len == s->session->session_id_length
|
---|
| 996 | && memcmp(PACKET_data(&session_id), s->session->session_id,
|
---|
| 997 | session_id_len) == 0) {
|
---|
| 998 | if (s->sid_ctx_length != s->session->sid_ctx_length
|
---|
| 999 | || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) {
|
---|
| 1000 | /* actually a client application bug */
|
---|
| 1001 | al = SSL_AD_ILLEGAL_PARAMETER;
|
---|
| 1002 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
|
---|
| 1003 | SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
|
---|
| 1004 | goto f_err;
|
---|
| 1005 | }
|
---|
| 1006 | s->hit = 1;
|
---|
| 1007 | } else {
|
---|
| 1008 | /*
|
---|
| 1009 | * If we were trying for session-id reuse but the server
|
---|
| 1010 | * didn't echo the ID, make a new SSL_SESSION.
|
---|
| 1011 | * In the case of EAP-FAST and PAC, we do not send a session ID,
|
---|
| 1012 | * so the PAC-based session secret is always preserved. It'll be
|
---|
| 1013 | * overwritten if the server refuses resumption.
|
---|
| 1014 | */
|
---|
| 1015 | if (s->session->session_id_length > 0) {
|
---|
| 1016 | s->ctx->stats.sess_miss++;
|
---|
| 1017 | if (!ssl_get_new_session(s, 0)) {
|
---|
| 1018 | goto f_err;
|
---|
| 1019 | }
|
---|
| 1020 | }
|
---|
| 1021 |
|
---|
| 1022 | s->session->ssl_version = s->version;
|
---|
| 1023 | s->session->session_id_length = session_id_len;
|
---|
| 1024 | /* session_id_len could be 0 */
|
---|
| 1025 | if (session_id_len > 0)
|
---|
| 1026 | memcpy(s->session->session_id, PACKET_data(&session_id),
|
---|
| 1027 | session_id_len);
|
---|
| 1028 | }
|
---|
| 1029 |
|
---|
| 1030 | /* Session version and negotiated protocol version should match */
|
---|
| 1031 | if (s->version != s->session->ssl_version) {
|
---|
| 1032 | al = SSL_AD_PROTOCOL_VERSION;
|
---|
| 1033 |
|
---|
| 1034 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
|
---|
| 1035 | SSL_R_SSL_SESSION_VERSION_MISMATCH);
|
---|
| 1036 | goto f_err;
|
---|
| 1037 | }
|
---|
| 1038 |
|
---|
| 1039 | c = ssl_get_cipher_by_char(s, cipherchars);
|
---|
| 1040 | if (c == NULL) {
|
---|
| 1041 | /* unknown cipher */
|
---|
| 1042 | al = SSL_AD_ILLEGAL_PARAMETER;
|
---|
| 1043 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED);
|
---|
| 1044 | goto f_err;
|
---|
| 1045 | }
|
---|
| 1046 | /*
|
---|
| 1047 | * Now that we know the version, update the check to see if it's an allowed
|
---|
| 1048 | * version.
|
---|
| 1049 | */
|
---|
| 1050 | s->s3->tmp.min_ver = s->version;
|
---|
| 1051 | s->s3->tmp.max_ver = s->version;
|
---|
| 1052 | /*
|
---|
| 1053 | * If it is a disabled cipher we either didn't send it in client hello,
|
---|
| 1054 | * or it's not allowed for the selected protocol. So we return an error.
|
---|
| 1055 | */
|
---|
| 1056 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) {
|
---|
| 1057 | al = SSL_AD_ILLEGAL_PARAMETER;
|
---|
| 1058 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
|
---|
| 1059 | goto f_err;
|
---|
| 1060 | }
|
---|
| 1061 |
|
---|
| 1062 | sk = ssl_get_ciphers_by_id(s);
|
---|
| 1063 | i = sk_SSL_CIPHER_find(sk, c);
|
---|
| 1064 | if (i < 0) {
|
---|
| 1065 | /* we did not say we would use this cipher */
|
---|
| 1066 | al = SSL_AD_ILLEGAL_PARAMETER;
|
---|
| 1067 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
|
---|
| 1068 | goto f_err;
|
---|
| 1069 | }
|
---|
| 1070 |
|
---|
| 1071 | /*
|
---|
| 1072 | * Depending on the session caching (internal/external), the cipher
|
---|
| 1073 | * and/or cipher_id values may not be set. Make sure that cipher_id is
|
---|
| 1074 | * set and use it for comparison.
|
---|
| 1075 | */
|
---|
| 1076 | if (s->session->cipher)
|
---|
| 1077 | s->session->cipher_id = s->session->cipher->id;
|
---|
| 1078 | if (s->hit && (s->session->cipher_id != c->id)) {
|
---|
| 1079 | al = SSL_AD_ILLEGAL_PARAMETER;
|
---|
| 1080 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
|
---|
| 1081 | SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
|
---|
| 1082 | goto f_err;
|
---|
| 1083 | }
|
---|
| 1084 | s->s3->tmp.new_cipher = c;
|
---|
| 1085 | /* lets get the compression algorithm */
|
---|
| 1086 | /* COMPRESSION */
|
---|
| 1087 | if (!PACKET_get_1(pkt, &compression)) {
|
---|
| 1088 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
|
---|
| 1089 | al = SSL_AD_DECODE_ERROR;
|
---|
| 1090 | goto f_err;
|
---|
| 1091 | }
|
---|
| 1092 | #ifdef OPENSSL_NO_COMP
|
---|
| 1093 | if (compression != 0) {
|
---|
| 1094 | al = SSL_AD_ILLEGAL_PARAMETER;
|
---|
| 1095 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
|
---|
| 1096 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
|
---|
| 1097 | goto f_err;
|
---|
| 1098 | }
|
---|
| 1099 | /*
|
---|
| 1100 | * If compression is disabled we'd better not try to resume a session
|
---|
| 1101 | * using compression.
|
---|
| 1102 | */
|
---|
| 1103 | if (s->session->compress_meth != 0) {
|
---|
| 1104 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION);
|
---|
| 1105 | goto f_err;
|
---|
| 1106 | }
|
---|
| 1107 | #else
|
---|
| 1108 | if (s->hit && compression != s->session->compress_meth) {
|
---|
| 1109 | al = SSL_AD_ILLEGAL_PARAMETER;
|
---|
| 1110 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
|
---|
| 1111 | SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
|
---|
| 1112 | goto f_err;
|
---|
| 1113 | }
|
---|
| 1114 | if (compression == 0)
|
---|
| 1115 | comp = NULL;
|
---|
| 1116 | else if (!ssl_allow_compression(s)) {
|
---|
| 1117 | al = SSL_AD_ILLEGAL_PARAMETER;
|
---|
| 1118 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED);
|
---|
| 1119 | goto f_err;
|
---|
| 1120 | } else {
|
---|
| 1121 | comp = ssl3_comp_find(s->ctx->comp_methods, compression);
|
---|
| 1122 | }
|
---|
| 1123 |
|
---|
| 1124 | if (compression != 0 && comp == NULL) {
|
---|
| 1125 | al = SSL_AD_ILLEGAL_PARAMETER;
|
---|
| 1126 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
|
---|
| 1127 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
|
---|
| 1128 | goto f_err;
|
---|
| 1129 | } else {
|
---|
| 1130 | s->s3->tmp.new_compression = comp;
|
---|
| 1131 | }
|
---|
| 1132 | #endif
|
---|
| 1133 |
|
---|
| 1134 | /* TLS extensions */
|
---|
| 1135 | if (!ssl_parse_serverhello_tlsext(s, pkt)) {
|
---|
| 1136 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_PARSE_TLSEXT);
|
---|
| 1137 | goto err;
|
---|
| 1138 | }
|
---|
| 1139 |
|
---|
| 1140 | if (PACKET_remaining(pkt) != 0) {
|
---|
| 1141 | /* wrong packet length */
|
---|
| 1142 | al = SSL_AD_DECODE_ERROR;
|
---|
| 1143 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH);
|
---|
| 1144 | goto f_err;
|
---|
| 1145 | }
|
---|
| 1146 | #ifndef OPENSSL_NO_SCTP
|
---|
| 1147 | if (SSL_IS_DTLS(s) && s->hit) {
|
---|
| 1148 | unsigned char sctpauthkey[64];
|
---|
| 1149 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
|
---|
| 1150 |
|
---|
| 1151 | /*
|
---|
| 1152 | * Add new shared key for SCTP-Auth, will be ignored if
|
---|
| 1153 | * no SCTP used.
|
---|
| 1154 | */
|
---|
| 1155 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL,
|
---|
| 1156 | sizeof(DTLS1_SCTP_AUTH_LABEL));
|
---|
| 1157 |
|
---|
| 1158 | if (SSL_export_keying_material(s, sctpauthkey,
|
---|
| 1159 | sizeof(sctpauthkey),
|
---|
| 1160 | labelbuffer,
|
---|
| 1161 | sizeof(labelbuffer), NULL, 0, 0) <= 0)
|
---|
| 1162 | goto err;
|
---|
| 1163 |
|
---|
| 1164 | BIO_ctrl(SSL_get_wbio(s),
|
---|
| 1165 | BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
|
---|
| 1166 | sizeof(sctpauthkey), sctpauthkey);
|
---|
| 1167 | }
|
---|
| 1168 | #endif
|
---|
| 1169 |
|
---|
| 1170 | return MSG_PROCESS_CONTINUE_READING;
|
---|
| 1171 | f_err:
|
---|
| 1172 | ssl3_send_alert(s, SSL3_AL_FATAL, al);
|
---|
| 1173 | err:
|
---|
| 1174 | ossl_statem_set_error(s);
|
---|
| 1175 | return MSG_PROCESS_ERROR;
|
---|
| 1176 | }
|
---|
| 1177 |
|
---|
| 1178 | MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt)
|
---|
| 1179 | {
|
---|
| 1180 | int al, i, ret = MSG_PROCESS_ERROR, exp_idx;
|
---|
| 1181 | unsigned long cert_list_len, cert_len;
|
---|
| 1182 | X509 *x = NULL;
|
---|
| 1183 | const unsigned char *certstart, *certbytes;
|
---|
| 1184 | STACK_OF(X509) *sk = NULL;
|
---|
| 1185 | EVP_PKEY *pkey = NULL;
|
---|
| 1186 |
|
---|
| 1187 | if ((sk = sk_X509_new_null()) == NULL) {
|
---|
| 1188 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
|
---|
| 1189 | goto err;
|
---|
| 1190 | }
|
---|
| 1191 |
|
---|
| 1192 | if (!PACKET_get_net_3(pkt, &cert_list_len)
|
---|
| 1193 | || PACKET_remaining(pkt) != cert_list_len) {
|
---|
| 1194 | al = SSL_AD_DECODE_ERROR;
|
---|
| 1195 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH);
|
---|
| 1196 | goto f_err;
|
---|
| 1197 | }
|
---|
| 1198 | while (PACKET_remaining(pkt)) {
|
---|
| 1199 | if (!PACKET_get_net_3(pkt, &cert_len)
|
---|
| 1200 | || !PACKET_get_bytes(pkt, &certbytes, cert_len)) {
|
---|
| 1201 | al = SSL_AD_DECODE_ERROR;
|
---|
| 1202 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
|
---|
| 1203 | SSL_R_CERT_LENGTH_MISMATCH);
|
---|
| 1204 | goto f_err;
|
---|
| 1205 | }
|
---|
| 1206 |
|
---|
| 1207 | certstart = certbytes;
|
---|
| 1208 | x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len);
|
---|
| 1209 | if (x == NULL) {
|
---|
| 1210 | al = SSL_AD_BAD_CERTIFICATE;
|
---|
| 1211 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB);
|
---|
| 1212 | goto f_err;
|
---|
| 1213 | }
|
---|
| 1214 | if (certbytes != (certstart + cert_len)) {
|
---|
| 1215 | al = SSL_AD_DECODE_ERROR;
|
---|
| 1216 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
|
---|
| 1217 | SSL_R_CERT_LENGTH_MISMATCH);
|
---|
| 1218 | goto f_err;
|
---|
| 1219 | }
|
---|
| 1220 | if (!sk_X509_push(sk, x)) {
|
---|
| 1221 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
|
---|
| 1222 | goto err;
|
---|
| 1223 | }
|
---|
| 1224 | x = NULL;
|
---|
| 1225 | }
|
---|
| 1226 |
|
---|
| 1227 | i = ssl_verify_cert_chain(s, sk);
|
---|
| 1228 | /*
|
---|
| 1229 | * The documented interface is that SSL_VERIFY_PEER should be set in order
|
---|
| 1230 | * for client side verification of the server certificate to take place.
|
---|
| 1231 | * However, historically the code has only checked that *any* flag is set
|
---|
| 1232 | * to cause server verification to take place. Use of the other flags makes
|
---|
| 1233 | * no sense in client mode. An attempt to clean up the semantics was
|
---|
| 1234 | * reverted because at least one application *only* set
|
---|
| 1235 | * SSL_VERIFY_FAIL_IF_NO_PEER_CERT. Prior to the clean up this still caused
|
---|
| 1236 | * server verification to take place, after the clean up it silently did
|
---|
| 1237 | * nothing. SSL_CTX_set_verify()/SSL_set_verify() cannot validate the flags
|
---|
| 1238 | * sent to them because they are void functions. Therefore, we now use the
|
---|
| 1239 | * (less clean) historic behaviour of performing validation if any flag is
|
---|
| 1240 | * set. The *documented* interface remains the same.
|
---|
| 1241 | */
|
---|
| 1242 | if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) {
|
---|
| 1243 | al = ssl_verify_alarm_type(s->verify_result);
|
---|
| 1244 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
|
---|
| 1245 | SSL_R_CERTIFICATE_VERIFY_FAILED);
|
---|
| 1246 | goto f_err;
|
---|
| 1247 | }
|
---|
| 1248 | ERR_clear_error(); /* but we keep s->verify_result */
|
---|
| 1249 | if (i > 1) {
|
---|
| 1250 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i);
|
---|
| 1251 | al = SSL_AD_HANDSHAKE_FAILURE;
|
---|
| 1252 | goto f_err;
|
---|
| 1253 | }
|
---|
| 1254 |
|
---|
| 1255 | s->session->peer_chain = sk;
|
---|
| 1256 | /*
|
---|
| 1257 | * Inconsistency alert: cert_chain does include the peer's certificate,
|
---|
| 1258 | * which we don't include in statem_srvr.c
|
---|
| 1259 | */
|
---|
| 1260 | x = sk_X509_value(sk, 0);
|
---|
| 1261 | sk = NULL;
|
---|
| 1262 | /*
|
---|
| 1263 | * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end
|
---|
| 1264 | */
|
---|
| 1265 |
|
---|
| 1266 | pkey = X509_get0_pubkey(x);
|
---|
| 1267 |
|
---|
| 1268 | if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) {
|
---|
| 1269 | x = NULL;
|
---|
| 1270 | al = SSL3_AL_FATAL;
|
---|
| 1271 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
|
---|
| 1272 | SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
|
---|
| 1273 | goto f_err;
|
---|
| 1274 | }
|
---|
| 1275 |
|
---|
| 1276 | i = ssl_cert_type(x, pkey);
|
---|
| 1277 | if (i < 0) {
|
---|
| 1278 | x = NULL;
|
---|
| 1279 | al = SSL3_AL_FATAL;
|
---|
| 1280 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
|
---|
| 1281 | SSL_R_UNKNOWN_CERTIFICATE_TYPE);
|
---|
| 1282 | goto f_err;
|
---|
| 1283 | }
|
---|
| 1284 |
|
---|
| 1285 | exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
|
---|
| 1286 | if (exp_idx >= 0 && i != exp_idx
|
---|
| 1287 | && (exp_idx != SSL_PKEY_GOST_EC ||
|
---|
| 1288 | (i != SSL_PKEY_GOST12_512 && i != SSL_PKEY_GOST12_256
|
---|
| 1289 | && i != SSL_PKEY_GOST01))) {
|
---|
| 1290 | x = NULL;
|
---|
| 1291 | al = SSL_AD_ILLEGAL_PARAMETER;
|
---|
| 1292 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
|
---|
| 1293 | SSL_R_WRONG_CERTIFICATE_TYPE);
|
---|
| 1294 | goto f_err;
|
---|
| 1295 | }
|
---|
| 1296 | s->session->peer_type = i;
|
---|
| 1297 |
|
---|
| 1298 | X509_free(s->session->peer);
|
---|
| 1299 | X509_up_ref(x);
|
---|
| 1300 | s->session->peer = x;
|
---|
| 1301 | s->session->verify_result = s->verify_result;
|
---|
| 1302 |
|
---|
| 1303 | x = NULL;
|
---|
| 1304 | ret = MSG_PROCESS_CONTINUE_READING;
|
---|
| 1305 | goto done;
|
---|
| 1306 |
|
---|
| 1307 | f_err:
|
---|
| 1308 | ssl3_send_alert(s, SSL3_AL_FATAL, al);
|
---|
| 1309 | err:
|
---|
| 1310 | ossl_statem_set_error(s);
|
---|
| 1311 | done:
|
---|
| 1312 | X509_free(x);
|
---|
| 1313 | sk_X509_pop_free(sk, X509_free);
|
---|
| 1314 | return ret;
|
---|
| 1315 | }
|
---|
| 1316 |
|
---|
| 1317 | static int tls_process_ske_psk_preamble(SSL *s, PACKET *pkt, int *al)
|
---|
| 1318 | {
|
---|
| 1319 | #ifndef OPENSSL_NO_PSK
|
---|
| 1320 | PACKET psk_identity_hint;
|
---|
| 1321 |
|
---|
| 1322 | /* PSK ciphersuites are preceded by an identity hint */
|
---|
| 1323 |
|
---|
| 1324 | if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) {
|
---|
| 1325 | *al = SSL_AD_DECODE_ERROR;
|
---|
| 1326 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_LENGTH_MISMATCH);
|
---|
| 1327 | return 0;
|
---|
| 1328 | }
|
---|
| 1329 |
|
---|
| 1330 | /*
|
---|
| 1331 | * Store PSK identity hint for later use, hint is used in
|
---|
| 1332 | * tls_construct_client_key_exchange. Assume that the maximum length of
|
---|
| 1333 | * a PSK identity hint can be as long as the maximum length of a PSK
|
---|
| 1334 | * identity.
|
---|
| 1335 | */
|
---|
| 1336 | if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) {
|
---|
| 1337 | *al = SSL_AD_HANDSHAKE_FAILURE;
|
---|
| 1338 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_DATA_LENGTH_TOO_LONG);
|
---|
| 1339 | return 0;
|
---|
| 1340 | }
|
---|
| 1341 |
|
---|
| 1342 | if (PACKET_remaining(&psk_identity_hint) == 0) {
|
---|
| 1343 | OPENSSL_free(s->session->psk_identity_hint);
|
---|
| 1344 | s->session->psk_identity_hint = NULL;
|
---|
| 1345 | } else if (!PACKET_strndup(&psk_identity_hint,
|
---|
| 1346 | &s->session->psk_identity_hint)) {
|
---|
| 1347 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
| 1348 | return 0;
|
---|
| 1349 | }
|
---|
| 1350 |
|
---|
| 1351 | return 1;
|
---|
| 1352 | #else
|
---|
| 1353 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
|
---|
| 1354 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
| 1355 | return 0;
|
---|
| 1356 | #endif
|
---|
| 1357 | }
|
---|
| 1358 |
|
---|
| 1359 | static int tls_process_ske_srp(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al)
|
---|
| 1360 | {
|
---|
| 1361 | #ifndef OPENSSL_NO_SRP
|
---|
| 1362 | PACKET prime, generator, salt, server_pub;
|
---|
| 1363 |
|
---|
| 1364 | if (!PACKET_get_length_prefixed_2(pkt, &prime)
|
---|
| 1365 | || !PACKET_get_length_prefixed_2(pkt, &generator)
|
---|
| 1366 | || !PACKET_get_length_prefixed_1(pkt, &salt)
|
---|
| 1367 | || !PACKET_get_length_prefixed_2(pkt, &server_pub)) {
|
---|
| 1368 | *al = SSL_AD_DECODE_ERROR;
|
---|
| 1369 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_LENGTH_MISMATCH);
|
---|
| 1370 | return 0;
|
---|
| 1371 | }
|
---|
| 1372 |
|
---|
| 1373 | if ((s->srp_ctx.N =
|
---|
| 1374 | BN_bin2bn(PACKET_data(&prime),
|
---|
| 1375 | PACKET_remaining(&prime), NULL)) == NULL
|
---|
| 1376 | || (s->srp_ctx.g =
|
---|
| 1377 | BN_bin2bn(PACKET_data(&generator),
|
---|
| 1378 | PACKET_remaining(&generator), NULL)) == NULL
|
---|
| 1379 | || (s->srp_ctx.s =
|
---|
| 1380 | BN_bin2bn(PACKET_data(&salt),
|
---|
| 1381 | PACKET_remaining(&salt), NULL)) == NULL
|
---|
| 1382 | || (s->srp_ctx.B =
|
---|
| 1383 | BN_bin2bn(PACKET_data(&server_pub),
|
---|
| 1384 | PACKET_remaining(&server_pub), NULL)) == NULL) {
|
---|
| 1385 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
| 1386 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_BN_LIB);
|
---|
| 1387 | return 0;
|
---|
| 1388 | }
|
---|
| 1389 |
|
---|
| 1390 | if (!srp_verify_server_param(s, al)) {
|
---|
| 1391 | *al = SSL_AD_DECODE_ERROR;
|
---|
| 1392 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_BAD_SRP_PARAMETERS);
|
---|
| 1393 | return 0;
|
---|
| 1394 | }
|
---|
| 1395 |
|
---|
| 1396 | /* We must check if there is a certificate */
|
---|
| 1397 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS))
|
---|
| 1398 | *pkey = X509_get0_pubkey(s->session->peer);
|
---|
| 1399 |
|
---|
| 1400 | return 1;
|
---|
| 1401 | #else
|
---|
| 1402 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_INTERNAL_ERROR);
|
---|
| 1403 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
| 1404 | return 0;
|
---|
| 1405 | #endif
|
---|
| 1406 | }
|
---|
| 1407 |
|
---|
| 1408 | static int tls_process_ske_dhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al)
|
---|
| 1409 | {
|
---|
| 1410 | #ifndef OPENSSL_NO_DH
|
---|
| 1411 | PACKET prime, generator, pub_key;
|
---|
| 1412 | EVP_PKEY *peer_tmp = NULL;
|
---|
| 1413 |
|
---|
| 1414 | DH *dh = NULL;
|
---|
| 1415 | BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL;
|
---|
| 1416 |
|
---|
| 1417 | int check_bits = 0;
|
---|
| 1418 |
|
---|
| 1419 | if (!PACKET_get_length_prefixed_2(pkt, &prime)
|
---|
| 1420 | || !PACKET_get_length_prefixed_2(pkt, &generator)
|
---|
| 1421 | || !PACKET_get_length_prefixed_2(pkt, &pub_key)) {
|
---|
| 1422 | *al = SSL_AD_DECODE_ERROR;
|
---|
| 1423 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_LENGTH_MISMATCH);
|
---|
| 1424 | return 0;
|
---|
| 1425 | }
|
---|
| 1426 |
|
---|
| 1427 | peer_tmp = EVP_PKEY_new();
|
---|
| 1428 | dh = DH_new();
|
---|
| 1429 |
|
---|
| 1430 | if (peer_tmp == NULL || dh == NULL) {
|
---|
| 1431 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
| 1432 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_MALLOC_FAILURE);
|
---|
| 1433 | goto err;
|
---|
| 1434 | }
|
---|
| 1435 |
|
---|
| 1436 | p = BN_bin2bn(PACKET_data(&prime), PACKET_remaining(&prime), NULL);
|
---|
| 1437 | g = BN_bin2bn(PACKET_data(&generator), PACKET_remaining(&generator), NULL);
|
---|
| 1438 | bnpub_key = BN_bin2bn(PACKET_data(&pub_key), PACKET_remaining(&pub_key),
|
---|
| 1439 | NULL);
|
---|
| 1440 | if (p == NULL || g == NULL || bnpub_key == NULL) {
|
---|
| 1441 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
| 1442 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB);
|
---|
| 1443 | goto err;
|
---|
| 1444 | }
|
---|
| 1445 |
|
---|
| 1446 | /* test non-zero pupkey */
|
---|
| 1447 | if (BN_is_zero(bnpub_key)) {
|
---|
| 1448 | *al = SSL_AD_DECODE_ERROR;
|
---|
| 1449 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE);
|
---|
| 1450 | goto err;
|
---|
| 1451 | }
|
---|
| 1452 |
|
---|
| 1453 | if (!DH_set0_pqg(dh, p, NULL, g)) {
|
---|
| 1454 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
| 1455 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB);
|
---|
| 1456 | goto err;
|
---|
| 1457 | }
|
---|
| 1458 | p = g = NULL;
|
---|
| 1459 |
|
---|
| 1460 | if (DH_check_params(dh, &check_bits) == 0 || check_bits != 0) {
|
---|
| 1461 | *al = SSL_AD_DECODE_ERROR;
|
---|
| 1462 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE);
|
---|
| 1463 | goto err;
|
---|
| 1464 | }
|
---|
| 1465 |
|
---|
| 1466 | if (!DH_set0_key(dh, bnpub_key, NULL)) {
|
---|
| 1467 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
| 1468 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB);
|
---|
| 1469 | goto err;
|
---|
| 1470 | }
|
---|
| 1471 | bnpub_key = NULL;
|
---|
| 1472 |
|
---|
| 1473 | if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) {
|
---|
| 1474 | *al = SSL_AD_HANDSHAKE_FAILURE;
|
---|
| 1475 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_DH_KEY_TOO_SMALL);
|
---|
| 1476 | goto err;
|
---|
| 1477 | }
|
---|
| 1478 |
|
---|
| 1479 | if (EVP_PKEY_assign_DH(peer_tmp, dh) == 0) {
|
---|
| 1480 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
| 1481 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_EVP_LIB);
|
---|
| 1482 | goto err;
|
---|
| 1483 | }
|
---|
| 1484 |
|
---|
| 1485 | s->s3->peer_tmp = peer_tmp;
|
---|
| 1486 |
|
---|
| 1487 | /*
|
---|
| 1488 | * FIXME: This makes assumptions about which ciphersuites come with
|
---|
| 1489 | * public keys. We should have a less ad-hoc way of doing this
|
---|
| 1490 | */
|
---|
| 1491 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS))
|
---|
| 1492 | *pkey = X509_get0_pubkey(s->session->peer);
|
---|
| 1493 | /* else anonymous DH, so no certificate or pkey. */
|
---|
| 1494 |
|
---|
| 1495 | return 1;
|
---|
| 1496 |
|
---|
| 1497 | err:
|
---|
| 1498 | BN_free(p);
|
---|
| 1499 | BN_free(g);
|
---|
| 1500 | BN_free(bnpub_key);
|
---|
| 1501 | DH_free(dh);
|
---|
| 1502 | EVP_PKEY_free(peer_tmp);
|
---|
| 1503 |
|
---|
| 1504 | return 0;
|
---|
| 1505 | #else
|
---|
| 1506 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_INTERNAL_ERROR);
|
---|
| 1507 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
| 1508 | return 0;
|
---|
| 1509 | #endif
|
---|
| 1510 | }
|
---|
| 1511 |
|
---|
| 1512 | static int tls_process_ske_ecdhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al)
|
---|
| 1513 | {
|
---|
| 1514 | #ifndef OPENSSL_NO_EC
|
---|
| 1515 | PACKET encoded_pt;
|
---|
| 1516 | const unsigned char *ecparams;
|
---|
| 1517 | int curve_nid;
|
---|
| 1518 | unsigned int curve_flags;
|
---|
| 1519 | EVP_PKEY_CTX *pctx = NULL;
|
---|
| 1520 |
|
---|
| 1521 | /*
|
---|
| 1522 | * Extract elliptic curve parameters and the server's ephemeral ECDH
|
---|
| 1523 | * public key. For now we only support named (not generic) curves and
|
---|
| 1524 | * ECParameters in this case is just three bytes.
|
---|
| 1525 | */
|
---|
| 1526 | if (!PACKET_get_bytes(pkt, &ecparams, 3)) {
|
---|
| 1527 | *al = SSL_AD_DECODE_ERROR;
|
---|
| 1528 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_TOO_SHORT);
|
---|
| 1529 | return 0;
|
---|
| 1530 | }
|
---|
| 1531 | /*
|
---|
| 1532 | * Check curve is one of our preferences, if not server has sent an
|
---|
| 1533 | * invalid curve. ECParameters is 3 bytes.
|
---|
| 1534 | */
|
---|
| 1535 | if (!tls1_check_curve(s, ecparams, 3)) {
|
---|
| 1536 | *al = SSL_AD_DECODE_ERROR;
|
---|
| 1537 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_WRONG_CURVE);
|
---|
| 1538 | return 0;
|
---|
| 1539 | }
|
---|
| 1540 |
|
---|
| 1541 | curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2), &curve_flags);
|
---|
| 1542 |
|
---|
| 1543 | if (curve_nid == 0) {
|
---|
| 1544 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
| 1545 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE,
|
---|
| 1546 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
|
---|
| 1547 | return 0;
|
---|
| 1548 | }
|
---|
| 1549 |
|
---|
| 1550 | if ((curve_flags & TLS_CURVE_TYPE) == TLS_CURVE_CUSTOM) {
|
---|
| 1551 | EVP_PKEY *key = EVP_PKEY_new();
|
---|
| 1552 |
|
---|
| 1553 | if (key == NULL || !EVP_PKEY_set_type(key, curve_nid)) {
|
---|
| 1554 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
| 1555 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB);
|
---|
| 1556 | EVP_PKEY_free(key);
|
---|
| 1557 | return 0;
|
---|
| 1558 | }
|
---|
| 1559 | s->s3->peer_tmp = key;
|
---|
| 1560 | } else {
|
---|
| 1561 | /* Set up EVP_PKEY with named curve as parameters */
|
---|
| 1562 | pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL);
|
---|
| 1563 | if (pctx == NULL
|
---|
| 1564 | || EVP_PKEY_paramgen_init(pctx) <= 0
|
---|
| 1565 | || EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx, curve_nid) <= 0
|
---|
| 1566 | || EVP_PKEY_paramgen(pctx, &s->s3->peer_tmp) <= 0) {
|
---|
| 1567 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
| 1568 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB);
|
---|
| 1569 | EVP_PKEY_CTX_free(pctx);
|
---|
| 1570 | return 0;
|
---|
| 1571 | }
|
---|
| 1572 | EVP_PKEY_CTX_free(pctx);
|
---|
| 1573 | pctx = NULL;
|
---|
| 1574 | }
|
---|
| 1575 |
|
---|
| 1576 | if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) {
|
---|
| 1577 | *al = SSL_AD_DECODE_ERROR;
|
---|
| 1578 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_MISMATCH);
|
---|
| 1579 | return 0;
|
---|
| 1580 | }
|
---|
| 1581 |
|
---|
| 1582 | if (!EVP_PKEY_set1_tls_encodedpoint(s->s3->peer_tmp,
|
---|
| 1583 | PACKET_data(&encoded_pt),
|
---|
| 1584 | PACKET_remaining(&encoded_pt))) {
|
---|
| 1585 | *al = SSL_AD_DECODE_ERROR;
|
---|
| 1586 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_BAD_ECPOINT);
|
---|
| 1587 | return 0;
|
---|
| 1588 | }
|
---|
| 1589 |
|
---|
| 1590 | /*
|
---|
| 1591 | * The ECC/TLS specification does not mention the use of DSA to sign
|
---|
| 1592 | * ECParameters in the server key exchange message. We do support RSA
|
---|
| 1593 | * and ECDSA.
|
---|
| 1594 | */
|
---|
| 1595 | if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA)
|
---|
| 1596 | *pkey = X509_get0_pubkey(s->session->peer);
|
---|
| 1597 | else if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aRSA)
|
---|
| 1598 | *pkey = X509_get0_pubkey(s->session->peer);
|
---|
| 1599 | /* else anonymous ECDH, so no certificate or pkey. */
|
---|
| 1600 |
|
---|
| 1601 | return 1;
|
---|
| 1602 | #else
|
---|
| 1603 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_INTERNAL_ERROR);
|
---|
| 1604 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
| 1605 | return 0;
|
---|
| 1606 | #endif
|
---|
| 1607 | }
|
---|
| 1608 |
|
---|
| 1609 | MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt)
|
---|
| 1610 | {
|
---|
| 1611 | int al = -1;
|
---|
| 1612 | long alg_k;
|
---|
| 1613 | EVP_PKEY *pkey = NULL;
|
---|
| 1614 | PACKET save_param_start, signature;
|
---|
| 1615 |
|
---|
| 1616 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
|
---|
| 1617 |
|
---|
| 1618 | save_param_start = *pkt;
|
---|
| 1619 |
|
---|
| 1620 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH)
|
---|
| 1621 | EVP_PKEY_free(s->s3->peer_tmp);
|
---|
| 1622 | s->s3->peer_tmp = NULL;
|
---|
| 1623 | #endif
|
---|
| 1624 |
|
---|
| 1625 | if (alg_k & SSL_PSK) {
|
---|
| 1626 | if (!tls_process_ske_psk_preamble(s, pkt, &al))
|
---|
| 1627 | goto err;
|
---|
| 1628 | }
|
---|
| 1629 |
|
---|
| 1630 | /* Nothing else to do for plain PSK or RSAPSK */
|
---|
| 1631 | if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) {
|
---|
| 1632 | } else if (alg_k & SSL_kSRP) {
|
---|
| 1633 | if (!tls_process_ske_srp(s, pkt, &pkey, &al))
|
---|
| 1634 | goto err;
|
---|
| 1635 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) {
|
---|
| 1636 | if (!tls_process_ske_dhe(s, pkt, &pkey, &al))
|
---|
| 1637 | goto err;
|
---|
| 1638 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) {
|
---|
| 1639 | if (!tls_process_ske_ecdhe(s, pkt, &pkey, &al))
|
---|
| 1640 | goto err;
|
---|
| 1641 | } else if (alg_k) {
|
---|
| 1642 | al = SSL_AD_UNEXPECTED_MESSAGE;
|
---|
| 1643 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
|
---|
| 1644 | goto err;
|
---|
| 1645 | }
|
---|
| 1646 |
|
---|
| 1647 | /* if it was signed, check the signature */
|
---|
| 1648 | if (pkey != NULL) {
|
---|
| 1649 | PACKET params;
|
---|
| 1650 | int maxsig;
|
---|
| 1651 | const EVP_MD *md = NULL;
|
---|
| 1652 | EVP_MD_CTX *md_ctx;
|
---|
| 1653 |
|
---|
| 1654 | /*
|
---|
| 1655 | * |pkt| now points to the beginning of the signature, so the difference
|
---|
| 1656 | * equals the length of the parameters.
|
---|
| 1657 | */
|
---|
| 1658 | if (!PACKET_get_sub_packet(&save_param_start, ¶ms,
|
---|
| 1659 | PACKET_remaining(&save_param_start) -
|
---|
| 1660 | PACKET_remaining(pkt))) {
|
---|
| 1661 | al = SSL_AD_INTERNAL_ERROR;
|
---|
| 1662 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
|
---|
| 1663 | goto err;
|
---|
| 1664 | }
|
---|
| 1665 |
|
---|
| 1666 | if (SSL_USE_SIGALGS(s)) {
|
---|
| 1667 | const unsigned char *sigalgs;
|
---|
| 1668 | int rv;
|
---|
| 1669 | if (!PACKET_get_bytes(pkt, &sigalgs, 2)) {
|
---|
| 1670 | al = SSL_AD_DECODE_ERROR;
|
---|
| 1671 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
|
---|
| 1672 | goto err;
|
---|
| 1673 | }
|
---|
| 1674 | rv = tls12_check_peer_sigalg(&md, s, sigalgs, pkey);
|
---|
| 1675 | if (rv == -1) {
|
---|
| 1676 | al = SSL_AD_INTERNAL_ERROR;
|
---|
| 1677 | goto err;
|
---|
| 1678 | } else if (rv == 0) {
|
---|
| 1679 | al = SSL_AD_DECODE_ERROR;
|
---|
| 1680 | goto err;
|
---|
| 1681 | }
|
---|
| 1682 | #ifdef SSL_DEBUG
|
---|
| 1683 | fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
|
---|
| 1684 | #endif
|
---|
| 1685 | } else if (EVP_PKEY_id(pkey) == EVP_PKEY_RSA) {
|
---|
| 1686 | md = EVP_md5_sha1();
|
---|
| 1687 | } else {
|
---|
| 1688 | md = EVP_sha1();
|
---|
| 1689 | }
|
---|
| 1690 |
|
---|
| 1691 | if (!PACKET_get_length_prefixed_2(pkt, &signature)
|
---|
| 1692 | || PACKET_remaining(pkt) != 0) {
|
---|
| 1693 | al = SSL_AD_DECODE_ERROR;
|
---|
| 1694 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
|
---|
| 1695 | goto err;
|
---|
| 1696 | }
|
---|
| 1697 | maxsig = EVP_PKEY_size(pkey);
|
---|
| 1698 | if (maxsig < 0) {
|
---|
| 1699 | al = SSL_AD_INTERNAL_ERROR;
|
---|
| 1700 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
|
---|
| 1701 | goto err;
|
---|
| 1702 | }
|
---|
| 1703 |
|
---|
| 1704 | /*
|
---|
| 1705 | * Check signature length
|
---|
| 1706 | */
|
---|
| 1707 | if (PACKET_remaining(&signature) > (size_t)maxsig) {
|
---|
| 1708 | /* wrong packet length */
|
---|
| 1709 | al = SSL_AD_DECODE_ERROR;
|
---|
| 1710 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE,
|
---|
| 1711 | SSL_R_WRONG_SIGNATURE_LENGTH);
|
---|
| 1712 | goto err;
|
---|
| 1713 | }
|
---|
| 1714 |
|
---|
| 1715 | md_ctx = EVP_MD_CTX_new();
|
---|
| 1716 | if (md_ctx == NULL) {
|
---|
| 1717 | al = SSL_AD_INTERNAL_ERROR;
|
---|
| 1718 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
|
---|
| 1719 | goto err;
|
---|
| 1720 | }
|
---|
| 1721 |
|
---|
| 1722 | if (EVP_VerifyInit_ex(md_ctx, md, NULL) <= 0
|
---|
| 1723 | || EVP_VerifyUpdate(md_ctx, &(s->s3->client_random[0]),
|
---|
| 1724 | SSL3_RANDOM_SIZE) <= 0
|
---|
| 1725 | || EVP_VerifyUpdate(md_ctx, &(s->s3->server_random[0]),
|
---|
| 1726 | SSL3_RANDOM_SIZE) <= 0
|
---|
| 1727 | || EVP_VerifyUpdate(md_ctx, PACKET_data(¶ms),
|
---|
| 1728 | PACKET_remaining(¶ms)) <= 0) {
|
---|
| 1729 | EVP_MD_CTX_free(md_ctx);
|
---|
| 1730 | al = SSL_AD_INTERNAL_ERROR;
|
---|
| 1731 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB);
|
---|
| 1732 | goto err;
|
---|
| 1733 | }
|
---|
| 1734 | if (EVP_VerifyFinal(md_ctx, PACKET_data(&signature),
|
---|
| 1735 | PACKET_remaining(&signature), pkey) <= 0) {
|
---|
| 1736 | /* bad signature */
|
---|
| 1737 | EVP_MD_CTX_free(md_ctx);
|
---|
| 1738 | al = SSL_AD_DECRYPT_ERROR;
|
---|
| 1739 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE);
|
---|
| 1740 | goto err;
|
---|
| 1741 | }
|
---|
| 1742 | EVP_MD_CTX_free(md_ctx);
|
---|
| 1743 | } else {
|
---|
| 1744 | /* aNULL, aSRP or PSK do not need public keys */
|
---|
| 1745 | if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP))
|
---|
| 1746 | && !(alg_k & SSL_PSK)) {
|
---|
| 1747 | /* Might be wrong key type, check it */
|
---|
| 1748 | if (ssl3_check_cert_and_algorithm(s)) {
|
---|
| 1749 | /* Otherwise this shouldn't happen */
|
---|
| 1750 | al = SSL_AD_INTERNAL_ERROR;
|
---|
| 1751 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
|
---|
| 1752 | } else {
|
---|
| 1753 | al = SSL_AD_DECODE_ERROR;
|
---|
| 1754 | }
|
---|
| 1755 | goto err;
|
---|
| 1756 | }
|
---|
| 1757 | /* still data left over */
|
---|
| 1758 | if (PACKET_remaining(pkt) != 0) {
|
---|
| 1759 | al = SSL_AD_DECODE_ERROR;
|
---|
| 1760 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE);
|
---|
| 1761 | goto err;
|
---|
| 1762 | }
|
---|
| 1763 | }
|
---|
| 1764 |
|
---|
| 1765 | return MSG_PROCESS_CONTINUE_READING;
|
---|
| 1766 | err:
|
---|
| 1767 | if (al != -1)
|
---|
| 1768 | ssl3_send_alert(s, SSL3_AL_FATAL, al);
|
---|
| 1769 | ossl_statem_set_error(s);
|
---|
| 1770 | return MSG_PROCESS_ERROR;
|
---|
| 1771 | }
|
---|
| 1772 |
|
---|
| 1773 | MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt)
|
---|
| 1774 | {
|
---|
| 1775 | int ret = MSG_PROCESS_ERROR;
|
---|
| 1776 | unsigned int list_len, ctype_num, i, name_len;
|
---|
| 1777 | X509_NAME *xn = NULL;
|
---|
| 1778 | const unsigned char *data;
|
---|
| 1779 | const unsigned char *namestart, *namebytes;
|
---|
| 1780 | STACK_OF(X509_NAME) *ca_sk = NULL;
|
---|
| 1781 |
|
---|
| 1782 | if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) {
|
---|
| 1783 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
|
---|
| 1784 | goto err;
|
---|
| 1785 | }
|
---|
| 1786 |
|
---|
| 1787 | /* get the certificate types */
|
---|
| 1788 | if (!PACKET_get_1(pkt, &ctype_num)
|
---|
| 1789 | || !PACKET_get_bytes(pkt, &data, ctype_num)) {
|
---|
| 1790 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
|
---|
| 1791 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
|
---|
| 1792 | goto err;
|
---|
| 1793 | }
|
---|
| 1794 | OPENSSL_free(s->cert->ctypes);
|
---|
| 1795 | s->cert->ctypes = NULL;
|
---|
| 1796 | if (ctype_num > SSL3_CT_NUMBER) {
|
---|
| 1797 | /* If we exceed static buffer copy all to cert structure */
|
---|
| 1798 | s->cert->ctypes = OPENSSL_malloc(ctype_num);
|
---|
| 1799 | if (s->cert->ctypes == NULL) {
|
---|
| 1800 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
|
---|
| 1801 | goto err;
|
---|
| 1802 | }
|
---|
| 1803 | memcpy(s->cert->ctypes, data, ctype_num);
|
---|
| 1804 | s->cert->ctype_num = (size_t)ctype_num;
|
---|
| 1805 | ctype_num = SSL3_CT_NUMBER;
|
---|
| 1806 | }
|
---|
| 1807 | for (i = 0; i < ctype_num; i++)
|
---|
| 1808 | s->s3->tmp.ctype[i] = data[i];
|
---|
| 1809 |
|
---|
| 1810 | if (SSL_USE_SIGALGS(s)) {
|
---|
| 1811 | if (!PACKET_get_net_2(pkt, &list_len)
|
---|
| 1812 | || !PACKET_get_bytes(pkt, &data, list_len)) {
|
---|
| 1813 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
|
---|
| 1814 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
|
---|
| 1815 | SSL_R_LENGTH_MISMATCH);
|
---|
| 1816 | goto err;
|
---|
| 1817 | }
|
---|
| 1818 |
|
---|
| 1819 | /* Clear certificate digests and validity flags */
|
---|
| 1820 | for (i = 0; i < SSL_PKEY_NUM; i++) {
|
---|
| 1821 | s->s3->tmp.md[i] = NULL;
|
---|
| 1822 | s->s3->tmp.valid_flags[i] = 0;
|
---|
| 1823 | }
|
---|
| 1824 | if ((list_len & 1) || !tls1_save_sigalgs(s, data, list_len)) {
|
---|
| 1825 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
|
---|
| 1826 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
|
---|
| 1827 | SSL_R_SIGNATURE_ALGORITHMS_ERROR);
|
---|
| 1828 | goto err;
|
---|
| 1829 | }
|
---|
| 1830 | if (!tls1_process_sigalgs(s)) {
|
---|
| 1831 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
|
---|
| 1832 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
|
---|
| 1833 | goto err;
|
---|
| 1834 | }
|
---|
| 1835 | } else {
|
---|
| 1836 | ssl_set_default_md(s);
|
---|
| 1837 | }
|
---|
| 1838 |
|
---|
| 1839 | /* get the CA RDNs */
|
---|
| 1840 | if (!PACKET_get_net_2(pkt, &list_len)
|
---|
| 1841 | || PACKET_remaining(pkt) != list_len) {
|
---|
| 1842 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
|
---|
| 1843 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
|
---|
| 1844 | goto err;
|
---|
| 1845 | }
|
---|
| 1846 |
|
---|
| 1847 | while (PACKET_remaining(pkt)) {
|
---|
| 1848 | if (!PACKET_get_net_2(pkt, &name_len)
|
---|
| 1849 | || !PACKET_get_bytes(pkt, &namebytes, name_len)) {
|
---|
| 1850 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
|
---|
| 1851 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
|
---|
| 1852 | SSL_R_LENGTH_MISMATCH);
|
---|
| 1853 | goto err;
|
---|
| 1854 | }
|
---|
| 1855 |
|
---|
| 1856 | namestart = namebytes;
|
---|
| 1857 |
|
---|
| 1858 | if ((xn = d2i_X509_NAME(NULL, (const unsigned char **)&namebytes,
|
---|
| 1859 | name_len)) == NULL) {
|
---|
| 1860 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
|
---|
| 1861 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB);
|
---|
| 1862 | goto err;
|
---|
| 1863 | }
|
---|
| 1864 |
|
---|
| 1865 | if (namebytes != (namestart + name_len)) {
|
---|
| 1866 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
|
---|
| 1867 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
|
---|
| 1868 | SSL_R_CA_DN_LENGTH_MISMATCH);
|
---|
| 1869 | goto err;
|
---|
| 1870 | }
|
---|
| 1871 | if (!sk_X509_NAME_push(ca_sk, xn)) {
|
---|
| 1872 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
|
---|
| 1873 | goto err;
|
---|
| 1874 | }
|
---|
| 1875 | xn = NULL;
|
---|
| 1876 | }
|
---|
| 1877 |
|
---|
| 1878 | /* we should setup a certificate to return.... */
|
---|
| 1879 | s->s3->tmp.cert_req = 1;
|
---|
| 1880 | s->s3->tmp.ctype_num = ctype_num;
|
---|
| 1881 | sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free);
|
---|
| 1882 | s->s3->tmp.ca_names = ca_sk;
|
---|
| 1883 | ca_sk = NULL;
|
---|
| 1884 |
|
---|
| 1885 | ret = MSG_PROCESS_CONTINUE_PROCESSING;
|
---|
| 1886 | goto done;
|
---|
| 1887 | err:
|
---|
| 1888 | ossl_statem_set_error(s);
|
---|
| 1889 | done:
|
---|
| 1890 | X509_NAME_free(xn);
|
---|
| 1891 | sk_X509_NAME_pop_free(ca_sk, X509_NAME_free);
|
---|
| 1892 | return ret;
|
---|
| 1893 | }
|
---|
| 1894 |
|
---|
| 1895 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
|
---|
| 1896 | {
|
---|
| 1897 | return (X509_NAME_cmp(*a, *b));
|
---|
| 1898 | }
|
---|
| 1899 |
|
---|
| 1900 | MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt)
|
---|
| 1901 | {
|
---|
| 1902 | int al;
|
---|
| 1903 | unsigned int ticklen;
|
---|
| 1904 | unsigned long ticket_lifetime_hint;
|
---|
| 1905 |
|
---|
| 1906 | if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint)
|
---|
| 1907 | || !PACKET_get_net_2(pkt, &ticklen)
|
---|
| 1908 | || PACKET_remaining(pkt) != ticklen) {
|
---|
| 1909 | al = SSL_AD_DECODE_ERROR;
|
---|
| 1910 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
|
---|
| 1911 | goto f_err;
|
---|
| 1912 | }
|
---|
| 1913 |
|
---|
| 1914 | /* Server is allowed to change its mind and send an empty ticket. */
|
---|
| 1915 | if (ticklen == 0)
|
---|
| 1916 | return MSG_PROCESS_CONTINUE_READING;
|
---|
| 1917 |
|
---|
| 1918 | if (s->session->session_id_length > 0) {
|
---|
| 1919 | int i = s->session_ctx->session_cache_mode;
|
---|
| 1920 | SSL_SESSION *new_sess;
|
---|
| 1921 | /*
|
---|
| 1922 | * We reused an existing session, so we need to replace it with a new
|
---|
| 1923 | * one
|
---|
| 1924 | */
|
---|
| 1925 | if (i & SSL_SESS_CACHE_CLIENT) {
|
---|
| 1926 | /*
|
---|
| 1927 | * Remove the old session from the cache. We carry on if this fails
|
---|
| 1928 | */
|
---|
| 1929 | SSL_CTX_remove_session(s->session_ctx, s->session);
|
---|
| 1930 | }
|
---|
| 1931 |
|
---|
| 1932 | if ((new_sess = ssl_session_dup(s->session, 0)) == 0) {
|
---|
| 1933 | al = SSL_AD_INTERNAL_ERROR;
|
---|
| 1934 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
|
---|
| 1935 | goto f_err;
|
---|
| 1936 | }
|
---|
| 1937 |
|
---|
| 1938 | SSL_SESSION_free(s->session);
|
---|
| 1939 | s->session = new_sess;
|
---|
| 1940 | }
|
---|
| 1941 |
|
---|
| 1942 | OPENSSL_free(s->session->tlsext_tick);
|
---|
| 1943 | s->session->tlsext_ticklen = 0;
|
---|
| 1944 |
|
---|
| 1945 | s->session->tlsext_tick = OPENSSL_malloc(ticklen);
|
---|
| 1946 | if (s->session->tlsext_tick == NULL) {
|
---|
| 1947 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
|
---|
| 1948 | goto err;
|
---|
| 1949 | }
|
---|
| 1950 | if (!PACKET_copy_bytes(pkt, s->session->tlsext_tick, ticklen)) {
|
---|
| 1951 | al = SSL_AD_DECODE_ERROR;
|
---|
| 1952 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
|
---|
| 1953 | goto f_err;
|
---|
| 1954 | }
|
---|
| 1955 |
|
---|
| 1956 | s->session->tlsext_tick_lifetime_hint = ticket_lifetime_hint;
|
---|
| 1957 | s->session->tlsext_ticklen = ticklen;
|
---|
| 1958 | /*
|
---|
| 1959 | * There are two ways to detect a resumed ticket session. One is to set
|
---|
| 1960 | * an appropriate session ID and then the server must return a match in
|
---|
| 1961 | * ServerHello. This allows the normal client session ID matching to work
|
---|
| 1962 | * and we know much earlier that the ticket has been accepted. The
|
---|
| 1963 | * other way is to set zero length session ID when the ticket is
|
---|
| 1964 | * presented and rely on the handshake to determine session resumption.
|
---|
| 1965 | * We choose the former approach because this fits in with assumptions
|
---|
| 1966 | * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is
|
---|
| 1967 | * SHA256 is disabled) hash of the ticket.
|
---|
| 1968 | */
|
---|
| 1969 | if (!EVP_Digest(s->session->tlsext_tick, ticklen,
|
---|
| 1970 | s->session->session_id, &s->session->session_id_length,
|
---|
| 1971 | EVP_sha256(), NULL)) {
|
---|
| 1972 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_EVP_LIB);
|
---|
| 1973 | goto err;
|
---|
| 1974 | }
|
---|
| 1975 | return MSG_PROCESS_CONTINUE_READING;
|
---|
| 1976 | f_err:
|
---|
| 1977 | ssl3_send_alert(s, SSL3_AL_FATAL, al);
|
---|
| 1978 | err:
|
---|
| 1979 | ossl_statem_set_error(s);
|
---|
| 1980 | return MSG_PROCESS_ERROR;
|
---|
| 1981 | }
|
---|
| 1982 |
|
---|
| 1983 | MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt)
|
---|
| 1984 | {
|
---|
| 1985 | int al;
|
---|
| 1986 | unsigned long resplen;
|
---|
| 1987 | unsigned int type;
|
---|
| 1988 |
|
---|
| 1989 | if (!PACKET_get_1(pkt, &type)
|
---|
| 1990 | || type != TLSEXT_STATUSTYPE_ocsp) {
|
---|
| 1991 | al = SSL_AD_DECODE_ERROR;
|
---|
| 1992 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE);
|
---|
| 1993 | goto f_err;
|
---|
| 1994 | }
|
---|
| 1995 | if (!PACKET_get_net_3(pkt, &resplen)
|
---|
| 1996 | || PACKET_remaining(pkt) != resplen) {
|
---|
| 1997 | al = SSL_AD_DECODE_ERROR;
|
---|
| 1998 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
|
---|
| 1999 | goto f_err;
|
---|
| 2000 | }
|
---|
| 2001 | s->tlsext_ocsp_resp = OPENSSL_malloc(resplen);
|
---|
| 2002 | if (s->tlsext_ocsp_resp == NULL) {
|
---|
| 2003 | al = SSL_AD_INTERNAL_ERROR;
|
---|
| 2004 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_MALLOC_FAILURE);
|
---|
| 2005 | goto f_err;
|
---|
| 2006 | }
|
---|
| 2007 | if (!PACKET_copy_bytes(pkt, s->tlsext_ocsp_resp, resplen)) {
|
---|
| 2008 | al = SSL_AD_DECODE_ERROR;
|
---|
| 2009 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
|
---|
| 2010 | goto f_err;
|
---|
| 2011 | }
|
---|
| 2012 | s->tlsext_ocsp_resplen = resplen;
|
---|
| 2013 | return MSG_PROCESS_CONTINUE_READING;
|
---|
| 2014 | f_err:
|
---|
| 2015 | ssl3_send_alert(s, SSL3_AL_FATAL, al);
|
---|
| 2016 | ossl_statem_set_error(s);
|
---|
| 2017 | return MSG_PROCESS_ERROR;
|
---|
| 2018 | }
|
---|
| 2019 |
|
---|
| 2020 | MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt)
|
---|
| 2021 | {
|
---|
| 2022 | if (PACKET_remaining(pkt) > 0) {
|
---|
| 2023 | /* should contain no data */
|
---|
| 2024 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
|
---|
| 2025 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH);
|
---|
| 2026 | ossl_statem_set_error(s);
|
---|
| 2027 | return MSG_PROCESS_ERROR;
|
---|
| 2028 | }
|
---|
| 2029 | #ifndef OPENSSL_NO_SRP
|
---|
| 2030 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
|
---|
| 2031 | if (SRP_Calc_A_param(s) <= 0) {
|
---|
| 2032 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC);
|
---|
| 2033 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
|
---|
| 2034 | ossl_statem_set_error(s);
|
---|
| 2035 | return MSG_PROCESS_ERROR;
|
---|
| 2036 | }
|
---|
| 2037 | }
|
---|
| 2038 | #endif
|
---|
| 2039 |
|
---|
| 2040 | /*
|
---|
| 2041 | * at this point we check that we have the required stuff from
|
---|
| 2042 | * the server
|
---|
| 2043 | */
|
---|
| 2044 | if (!ssl3_check_cert_and_algorithm(s)) {
|
---|
| 2045 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
|
---|
| 2046 | ossl_statem_set_error(s);
|
---|
| 2047 | return MSG_PROCESS_ERROR;
|
---|
| 2048 | }
|
---|
| 2049 |
|
---|
| 2050 | /*
|
---|
| 2051 | * Call the ocsp status callback if needed. The |tlsext_ocsp_resp| and
|
---|
| 2052 | * |tlsext_ocsp_resplen| values will be set if we actually received a status
|
---|
| 2053 | * message, or NULL and -1 otherwise
|
---|
| 2054 | */
|
---|
| 2055 | if (s->tlsext_status_type != -1 && s->ctx->tlsext_status_cb != NULL) {
|
---|
| 2056 | int ret;
|
---|
| 2057 | ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
|
---|
| 2058 | if (ret == 0) {
|
---|
| 2059 | ssl3_send_alert(s, SSL3_AL_FATAL,
|
---|
| 2060 | SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
|
---|
| 2061 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE,
|
---|
| 2062 | SSL_R_INVALID_STATUS_RESPONSE);
|
---|
| 2063 | return MSG_PROCESS_ERROR;
|
---|
| 2064 | }
|
---|
| 2065 | if (ret < 0) {
|
---|
| 2066 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
|
---|
| 2067 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, ERR_R_MALLOC_FAILURE);
|
---|
| 2068 | return MSG_PROCESS_ERROR;
|
---|
| 2069 | }
|
---|
| 2070 | }
|
---|
| 2071 | #ifndef OPENSSL_NO_CT
|
---|
| 2072 | if (s->ct_validation_callback != NULL) {
|
---|
| 2073 | /* Note we validate the SCTs whether or not we abort on error */
|
---|
| 2074 | if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) {
|
---|
| 2075 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
|
---|
| 2076 | return MSG_PROCESS_ERROR;
|
---|
| 2077 | }
|
---|
| 2078 | }
|
---|
| 2079 | #endif
|
---|
| 2080 |
|
---|
| 2081 | #ifndef OPENSSL_NO_SCTP
|
---|
| 2082 | /* Only applies to renegotiation */
|
---|
| 2083 | if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s))
|
---|
| 2084 | && s->renegotiate != 0)
|
---|
| 2085 | return MSG_PROCESS_CONTINUE_PROCESSING;
|
---|
| 2086 | else
|
---|
| 2087 | #endif
|
---|
| 2088 | return MSG_PROCESS_FINISHED_READING;
|
---|
| 2089 | }
|
---|
| 2090 |
|
---|
| 2091 | static int tls_construct_cke_psk_preamble(SSL *s, unsigned char **p,
|
---|
| 2092 | size_t *pskhdrlen, int *al)
|
---|
| 2093 | {
|
---|
| 2094 | #ifndef OPENSSL_NO_PSK
|
---|
| 2095 | int ret = 0;
|
---|
| 2096 | /*
|
---|
| 2097 | * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a
|
---|
| 2098 | * \0-terminated identity. The last byte is for us for simulating
|
---|
| 2099 | * strnlen.
|
---|
| 2100 | */
|
---|
| 2101 | char identity[PSK_MAX_IDENTITY_LEN + 1];
|
---|
| 2102 | size_t identitylen = 0;
|
---|
| 2103 | unsigned char psk[PSK_MAX_PSK_LEN];
|
---|
| 2104 | unsigned char *tmppsk = NULL;
|
---|
| 2105 | char *tmpidentity = NULL;
|
---|
| 2106 | size_t psklen = 0;
|
---|
| 2107 |
|
---|
| 2108 | if (s->psk_client_callback == NULL) {
|
---|
| 2109 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, SSL_R_PSK_NO_CLIENT_CB);
|
---|
| 2110 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
| 2111 | goto err;
|
---|
| 2112 | }
|
---|
| 2113 |
|
---|
| 2114 | memset(identity, 0, sizeof(identity));
|
---|
| 2115 |
|
---|
| 2116 | psklen = s->psk_client_callback(s, s->session->psk_identity_hint,
|
---|
| 2117 | identity, sizeof(identity) - 1,
|
---|
| 2118 | psk, sizeof(psk));
|
---|
| 2119 |
|
---|
| 2120 | if (psklen > PSK_MAX_PSK_LEN) {
|
---|
| 2121 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
|
---|
| 2122 | *al = SSL_AD_HANDSHAKE_FAILURE;
|
---|
| 2123 | goto err;
|
---|
| 2124 | } else if (psklen == 0) {
|
---|
| 2125 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE,
|
---|
| 2126 | SSL_R_PSK_IDENTITY_NOT_FOUND);
|
---|
| 2127 | *al = SSL_AD_HANDSHAKE_FAILURE;
|
---|
| 2128 | goto err;
|
---|
| 2129 | }
|
---|
| 2130 |
|
---|
| 2131 | identitylen = strlen(identity);
|
---|
| 2132 | if (identitylen > PSK_MAX_IDENTITY_LEN) {
|
---|
| 2133 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
|
---|
| 2134 | *al = SSL_AD_HANDSHAKE_FAILURE;
|
---|
| 2135 | goto err;
|
---|
| 2136 | }
|
---|
| 2137 |
|
---|
| 2138 | tmppsk = OPENSSL_memdup(psk, psklen);
|
---|
| 2139 | tmpidentity = OPENSSL_strdup(identity);
|
---|
| 2140 | if (tmppsk == NULL || tmpidentity == NULL) {
|
---|
| 2141 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_MALLOC_FAILURE);
|
---|
| 2142 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
| 2143 | goto err;
|
---|
| 2144 | }
|
---|
| 2145 |
|
---|
| 2146 | OPENSSL_free(s->s3->tmp.psk);
|
---|
| 2147 | s->s3->tmp.psk = tmppsk;
|
---|
| 2148 | s->s3->tmp.psklen = psklen;
|
---|
| 2149 | tmppsk = NULL;
|
---|
| 2150 | OPENSSL_free(s->session->psk_identity);
|
---|
| 2151 | s->session->psk_identity = tmpidentity;
|
---|
| 2152 | tmpidentity = NULL;
|
---|
| 2153 | s2n(identitylen, *p);
|
---|
| 2154 | memcpy(*p, identity, identitylen);
|
---|
| 2155 | *pskhdrlen = 2 + identitylen;
|
---|
| 2156 | *p += identitylen;
|
---|
| 2157 |
|
---|
| 2158 | ret = 1;
|
---|
| 2159 |
|
---|
| 2160 | err:
|
---|
| 2161 | OPENSSL_cleanse(psk, psklen);
|
---|
| 2162 | OPENSSL_cleanse(identity, sizeof(identity));
|
---|
| 2163 | OPENSSL_clear_free(tmppsk, psklen);
|
---|
| 2164 | OPENSSL_clear_free(tmpidentity, identitylen);
|
---|
| 2165 |
|
---|
| 2166 | return ret;
|
---|
| 2167 | #else
|
---|
| 2168 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
|
---|
| 2169 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
| 2170 | return 0;
|
---|
| 2171 | #endif
|
---|
| 2172 | }
|
---|
| 2173 |
|
---|
| 2174 | static int tls_construct_cke_rsa(SSL *s, unsigned char **p, int *len, int *al)
|
---|
| 2175 | {
|
---|
| 2176 | #ifndef OPENSSL_NO_RSA
|
---|
| 2177 | unsigned char *q;
|
---|
| 2178 | EVP_PKEY *pkey = NULL;
|
---|
| 2179 | EVP_PKEY_CTX *pctx = NULL;
|
---|
| 2180 | size_t enclen;
|
---|
| 2181 | unsigned char *pms = NULL;
|
---|
| 2182 | size_t pmslen = 0;
|
---|
| 2183 |
|
---|
| 2184 | if (s->session->peer == NULL) {
|
---|
| 2185 | /*
|
---|
| 2186 | * We should always have a server certificate with SSL_kRSA.
|
---|
| 2187 | */
|
---|
| 2188 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
|
---|
| 2189 | return 0;
|
---|
| 2190 | }
|
---|
| 2191 |
|
---|
| 2192 | pkey = X509_get0_pubkey(s->session->peer);
|
---|
| 2193 | if (EVP_PKEY_get0_RSA(pkey) == NULL) {
|
---|
| 2194 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
|
---|
| 2195 | return 0;
|
---|
| 2196 | }
|
---|
| 2197 |
|
---|
| 2198 | pmslen = SSL_MAX_MASTER_KEY_LENGTH;
|
---|
| 2199 | pms = OPENSSL_malloc(pmslen);
|
---|
| 2200 | if (pms == NULL) {
|
---|
| 2201 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_MALLOC_FAILURE);
|
---|
| 2202 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
| 2203 | return 0;
|
---|
| 2204 | }
|
---|
| 2205 |
|
---|
| 2206 | pms[0] = s->client_version >> 8;
|
---|
| 2207 | pms[1] = s->client_version & 0xff;
|
---|
| 2208 | if (RAND_bytes(pms + 2, pmslen - 2) <= 0) {
|
---|
| 2209 | goto err;
|
---|
| 2210 | }
|
---|
| 2211 |
|
---|
| 2212 | q = *p;
|
---|
| 2213 | /* Fix buf for TLS and beyond */
|
---|
| 2214 | if (s->version > SSL3_VERSION)
|
---|
| 2215 | *p += 2;
|
---|
| 2216 | pctx = EVP_PKEY_CTX_new(pkey, NULL);
|
---|
| 2217 | if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0
|
---|
| 2218 | || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) {
|
---|
| 2219 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_EVP_LIB);
|
---|
| 2220 | goto err;
|
---|
| 2221 | }
|
---|
| 2222 | if (EVP_PKEY_encrypt(pctx, *p, &enclen, pms, pmslen) <= 0) {
|
---|
| 2223 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, SSL_R_BAD_RSA_ENCRYPT);
|
---|
| 2224 | goto err;
|
---|
| 2225 | }
|
---|
| 2226 | *len = enclen;
|
---|
| 2227 | EVP_PKEY_CTX_free(pctx);
|
---|
| 2228 | pctx = NULL;
|
---|
| 2229 | # ifdef PKCS1_CHECK
|
---|
| 2230 | if (s->options & SSL_OP_PKCS1_CHECK_1)
|
---|
| 2231 | (*p)[1]++;
|
---|
| 2232 | if (s->options & SSL_OP_PKCS1_CHECK_2)
|
---|
| 2233 | tmp_buf[0] = 0x70;
|
---|
| 2234 | # endif
|
---|
| 2235 |
|
---|
| 2236 | /* Fix buf for TLS and beyond */
|
---|
| 2237 | if (s->version > SSL3_VERSION) {
|
---|
| 2238 | s2n(*len, q);
|
---|
| 2239 | *len += 2;
|
---|
| 2240 | }
|
---|
| 2241 |
|
---|
| 2242 | s->s3->tmp.pms = pms;
|
---|
| 2243 | s->s3->tmp.pmslen = pmslen;
|
---|
| 2244 |
|
---|
| 2245 | return 1;
|
---|
| 2246 | err:
|
---|
| 2247 | OPENSSL_clear_free(pms, pmslen);
|
---|
| 2248 | EVP_PKEY_CTX_free(pctx);
|
---|
| 2249 |
|
---|
| 2250 | return 0;
|
---|
| 2251 | #else
|
---|
| 2252 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
|
---|
| 2253 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
| 2254 | return 0;
|
---|
| 2255 | #endif
|
---|
| 2256 | }
|
---|
| 2257 |
|
---|
| 2258 | static int tls_construct_cke_dhe(SSL *s, unsigned char **p, int *len, int *al)
|
---|
| 2259 | {
|
---|
| 2260 | #ifndef OPENSSL_NO_DH
|
---|
| 2261 | DH *dh_clnt = NULL;
|
---|
| 2262 | const BIGNUM *pub_key;
|
---|
| 2263 | EVP_PKEY *ckey = NULL, *skey = NULL;
|
---|
| 2264 |
|
---|
| 2265 | skey = s->s3->peer_tmp;
|
---|
| 2266 | if (skey == NULL) {
|
---|
| 2267 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR);
|
---|
| 2268 | return 0;
|
---|
| 2269 | }
|
---|
| 2270 | ckey = ssl_generate_pkey(skey);
|
---|
| 2271 | if (ckey == NULL) {
|
---|
| 2272 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR);
|
---|
| 2273 | return 0;
|
---|
| 2274 | }
|
---|
| 2275 |
|
---|
| 2276 | dh_clnt = EVP_PKEY_get0_DH(ckey);
|
---|
| 2277 |
|
---|
| 2278 | if (dh_clnt == NULL || ssl_derive(s, ckey, skey) == 0) {
|
---|
| 2279 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR);
|
---|
| 2280 | EVP_PKEY_free(ckey);
|
---|
| 2281 | return 0;
|
---|
| 2282 | }
|
---|
| 2283 |
|
---|
| 2284 | /* send off the data */
|
---|
| 2285 | DH_get0_key(dh_clnt, &pub_key, NULL);
|
---|
| 2286 | *len = BN_num_bytes(pub_key);
|
---|
| 2287 | s2n(*len, *p);
|
---|
| 2288 | BN_bn2bin(pub_key, *p);
|
---|
| 2289 | *len += 2;
|
---|
| 2290 | EVP_PKEY_free(ckey);
|
---|
| 2291 |
|
---|
| 2292 | return 1;
|
---|
| 2293 | #else
|
---|
| 2294 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR);
|
---|
| 2295 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
| 2296 | return 0;
|
---|
| 2297 | #endif
|
---|
| 2298 | }
|
---|
| 2299 |
|
---|
| 2300 | static int tls_construct_cke_ecdhe(SSL *s, unsigned char **p, int *len, int *al)
|
---|
| 2301 | {
|
---|
| 2302 | #ifndef OPENSSL_NO_EC
|
---|
| 2303 | unsigned char *encodedPoint = NULL;
|
---|
| 2304 | int encoded_pt_len = 0;
|
---|
| 2305 | EVP_PKEY *ckey = NULL, *skey = NULL;
|
---|
| 2306 |
|
---|
| 2307 | skey = s->s3->peer_tmp;
|
---|
| 2308 | if (skey == NULL) {
|
---|
| 2309 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR);
|
---|
| 2310 | return 0;
|
---|
| 2311 | }
|
---|
| 2312 |
|
---|
| 2313 | ckey = ssl_generate_pkey(skey);
|
---|
| 2314 | if (ckey == NULL) {
|
---|
| 2315 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR);
|
---|
| 2316 | goto err;
|
---|
| 2317 | }
|
---|
| 2318 |
|
---|
| 2319 | if (ssl_derive(s, ckey, skey) == 0) {
|
---|
| 2320 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EVP_LIB);
|
---|
| 2321 | goto err;
|
---|
| 2322 | }
|
---|
| 2323 |
|
---|
| 2324 | /* Generate encoding of client key */
|
---|
| 2325 | encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(ckey, &encodedPoint);
|
---|
| 2326 |
|
---|
| 2327 | if (encoded_pt_len == 0) {
|
---|
| 2328 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EC_LIB);
|
---|
| 2329 | goto err;
|
---|
| 2330 | }
|
---|
| 2331 |
|
---|
| 2332 | EVP_PKEY_free(ckey);
|
---|
| 2333 | ckey = NULL;
|
---|
| 2334 |
|
---|
| 2335 | *len = encoded_pt_len;
|
---|
| 2336 |
|
---|
| 2337 | /* length of encoded point */
|
---|
| 2338 | **p = *len;
|
---|
| 2339 | *p += 1;
|
---|
| 2340 | /* copy the point */
|
---|
| 2341 | memcpy(*p, encodedPoint, *len);
|
---|
| 2342 | /* increment len to account for length field */
|
---|
| 2343 | *len += 1;
|
---|
| 2344 |
|
---|
| 2345 | OPENSSL_free(encodedPoint);
|
---|
| 2346 |
|
---|
| 2347 | return 1;
|
---|
| 2348 | err:
|
---|
| 2349 | EVP_PKEY_free(ckey);
|
---|
| 2350 | return 0;
|
---|
| 2351 | #else
|
---|
| 2352 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR);
|
---|
| 2353 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
| 2354 | return 0;
|
---|
| 2355 | #endif
|
---|
| 2356 | }
|
---|
| 2357 |
|
---|
| 2358 | static int tls_construct_cke_gost(SSL *s, unsigned char **p, int *len, int *al)
|
---|
| 2359 | {
|
---|
| 2360 | #ifndef OPENSSL_NO_GOST
|
---|
| 2361 | /* GOST key exchange message creation */
|
---|
| 2362 | EVP_PKEY_CTX *pkey_ctx = NULL;
|
---|
| 2363 | X509 *peer_cert;
|
---|
| 2364 | size_t msglen;
|
---|
| 2365 | unsigned int md_len;
|
---|
| 2366 | unsigned char shared_ukm[32], tmp[256];
|
---|
| 2367 | EVP_MD_CTX *ukm_hash = NULL;
|
---|
| 2368 | int dgst_nid = NID_id_GostR3411_94;
|
---|
| 2369 | unsigned char *pms = NULL;
|
---|
| 2370 | size_t pmslen = 0;
|
---|
| 2371 |
|
---|
| 2372 | if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0)
|
---|
| 2373 | dgst_nid = NID_id_GostR3411_2012_256;
|
---|
| 2374 |
|
---|
| 2375 | /*
|
---|
| 2376 | * Get server sertificate PKEY and create ctx from it
|
---|
| 2377 | */
|
---|
| 2378 | peer_cert = s->session->peer;
|
---|
| 2379 | if (!peer_cert) {
|
---|
| 2380 | *al = SSL_AD_HANDSHAKE_FAILURE;
|
---|
| 2381 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST,
|
---|
| 2382 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
|
---|
| 2383 | return 0;
|
---|
| 2384 | }
|
---|
| 2385 |
|
---|
| 2386 | pkey_ctx = EVP_PKEY_CTX_new(X509_get0_pubkey(peer_cert), NULL);
|
---|
| 2387 | if (pkey_ctx == NULL) {
|
---|
| 2388 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
| 2389 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE);
|
---|
| 2390 | return 0;
|
---|
| 2391 | }
|
---|
| 2392 | /*
|
---|
| 2393 | * If we have send a certificate, and certificate key
|
---|
| 2394 | * parameters match those of server certificate, use
|
---|
| 2395 | * certificate key for key exchange
|
---|
| 2396 | */
|
---|
| 2397 |
|
---|
| 2398 | /* Otherwise, generate ephemeral key pair */
|
---|
| 2399 | pmslen = 32;
|
---|
| 2400 | pms = OPENSSL_malloc(pmslen);
|
---|
| 2401 | if (pms == NULL) {
|
---|
| 2402 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
| 2403 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE);
|
---|
| 2404 | goto err;
|
---|
| 2405 | }
|
---|
| 2406 |
|
---|
| 2407 | if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0
|
---|
| 2408 | /* Generate session key */
|
---|
| 2409 | || RAND_bytes(pms, pmslen) <= 0) {
|
---|
| 2410 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
| 2411 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR);
|
---|
| 2412 | goto err;
|
---|
| 2413 | };
|
---|
| 2414 | /*
|
---|
| 2415 | * Compute shared IV and store it in algorithm-specific context
|
---|
| 2416 | * data
|
---|
| 2417 | */
|
---|
| 2418 | ukm_hash = EVP_MD_CTX_new();
|
---|
| 2419 | if (ukm_hash == NULL
|
---|
| 2420 | || EVP_DigestInit(ukm_hash, EVP_get_digestbynid(dgst_nid)) <= 0
|
---|
| 2421 | || EVP_DigestUpdate(ukm_hash, s->s3->client_random,
|
---|
| 2422 | SSL3_RANDOM_SIZE) <= 0
|
---|
| 2423 | || EVP_DigestUpdate(ukm_hash, s->s3->server_random,
|
---|
| 2424 | SSL3_RANDOM_SIZE) <= 0
|
---|
| 2425 | || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) {
|
---|
| 2426 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
| 2427 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR);
|
---|
| 2428 | goto err;
|
---|
| 2429 | }
|
---|
| 2430 | EVP_MD_CTX_free(ukm_hash);
|
---|
| 2431 | ukm_hash = NULL;
|
---|
| 2432 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT,
|
---|
| 2433 | EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) < 0) {
|
---|
| 2434 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
| 2435 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG);
|
---|
| 2436 | goto err;
|
---|
| 2437 | }
|
---|
| 2438 | /* Make GOST keytransport blob message */
|
---|
| 2439 | /*
|
---|
| 2440 | * Encapsulate it into sequence
|
---|
| 2441 | */
|
---|
| 2442 | *((*p)++) = V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
|
---|
| 2443 | msglen = 255;
|
---|
| 2444 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) {
|
---|
| 2445 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
| 2446 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG);
|
---|
| 2447 | goto err;
|
---|
| 2448 | }
|
---|
| 2449 | if (msglen >= 0x80) {
|
---|
| 2450 | *((*p)++) = 0x81;
|
---|
| 2451 | *((*p)++) = msglen & 0xff;
|
---|
| 2452 | *len = msglen + 3;
|
---|
| 2453 | } else {
|
---|
| 2454 | *((*p)++) = msglen & 0xff;
|
---|
| 2455 | *len = msglen + 2;
|
---|
| 2456 | }
|
---|
| 2457 | memcpy(*p, tmp, msglen);
|
---|
| 2458 |
|
---|
| 2459 | EVP_PKEY_CTX_free(pkey_ctx);
|
---|
| 2460 | s->s3->tmp.pms = pms;
|
---|
| 2461 | s->s3->tmp.pmslen = pmslen;
|
---|
| 2462 |
|
---|
| 2463 | return 1;
|
---|
| 2464 | err:
|
---|
| 2465 | EVP_PKEY_CTX_free(pkey_ctx);
|
---|
| 2466 | OPENSSL_clear_free(pms, pmslen);
|
---|
| 2467 | EVP_MD_CTX_free(ukm_hash);
|
---|
| 2468 | return 0;
|
---|
| 2469 | #else
|
---|
| 2470 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR);
|
---|
| 2471 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
| 2472 | return 0;
|
---|
| 2473 | #endif
|
---|
| 2474 | }
|
---|
| 2475 |
|
---|
| 2476 | static int tls_construct_cke_srp(SSL *s, unsigned char **p, int *len, int *al)
|
---|
| 2477 | {
|
---|
| 2478 | #ifndef OPENSSL_NO_SRP
|
---|
| 2479 | if (s->srp_ctx.A != NULL) {
|
---|
| 2480 | /* send off the data */
|
---|
| 2481 | *len = BN_num_bytes(s->srp_ctx.A);
|
---|
| 2482 | s2n(*len, *p);
|
---|
| 2483 | BN_bn2bin(s->srp_ctx.A, *p);
|
---|
| 2484 | *len += 2;
|
---|
| 2485 | } else {
|
---|
| 2486 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR);
|
---|
| 2487 | return 0;
|
---|
| 2488 | }
|
---|
| 2489 | OPENSSL_free(s->session->srp_username);
|
---|
| 2490 | s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login);
|
---|
| 2491 | if (s->session->srp_username == NULL) {
|
---|
| 2492 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_MALLOC_FAILURE);
|
---|
| 2493 | return 0;
|
---|
| 2494 | }
|
---|
| 2495 |
|
---|
| 2496 | return 1;
|
---|
| 2497 | #else
|
---|
| 2498 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR);
|
---|
| 2499 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
| 2500 | return 0;
|
---|
| 2501 | #endif
|
---|
| 2502 | }
|
---|
| 2503 |
|
---|
| 2504 | int tls_construct_client_key_exchange(SSL *s)
|
---|
| 2505 | {
|
---|
| 2506 | unsigned char *p;
|
---|
| 2507 | int len;
|
---|
| 2508 | size_t pskhdrlen = 0;
|
---|
| 2509 | unsigned long alg_k;
|
---|
| 2510 | int al = -1;
|
---|
| 2511 |
|
---|
| 2512 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
|
---|
| 2513 |
|
---|
| 2514 | p = ssl_handshake_start(s);
|
---|
| 2515 |
|
---|
| 2516 | if ((alg_k & SSL_PSK)
|
---|
| 2517 | && !tls_construct_cke_psk_preamble(s, &p, &pskhdrlen, &al))
|
---|
| 2518 | goto err;
|
---|
| 2519 |
|
---|
| 2520 | if (alg_k & SSL_kPSK) {
|
---|
| 2521 | len = 0;
|
---|
| 2522 | } else if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) {
|
---|
| 2523 | if (!tls_construct_cke_rsa(s, &p, &len, &al))
|
---|
| 2524 | goto err;
|
---|
| 2525 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) {
|
---|
| 2526 | if (!tls_construct_cke_dhe(s, &p, &len, &al))
|
---|
| 2527 | goto err;
|
---|
| 2528 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) {
|
---|
| 2529 | if (!tls_construct_cke_ecdhe(s, &p, &len, &al))
|
---|
| 2530 | goto err;
|
---|
| 2531 | } else if (alg_k & SSL_kGOST) {
|
---|
| 2532 | if (!tls_construct_cke_gost(s, &p, &len, &al))
|
---|
| 2533 | goto err;
|
---|
| 2534 | } else if (alg_k & SSL_kSRP) {
|
---|
| 2535 | if (!tls_construct_cke_srp(s, &p, &len, &al))
|
---|
| 2536 | goto err;
|
---|
| 2537 | } else {
|
---|
| 2538 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
|
---|
| 2539 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
|
---|
| 2540 | goto err;
|
---|
| 2541 | }
|
---|
| 2542 |
|
---|
| 2543 | len += pskhdrlen;
|
---|
| 2544 |
|
---|
| 2545 | if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, len)) {
|
---|
| 2546 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
|
---|
| 2547 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
|
---|
| 2548 | goto err;
|
---|
| 2549 | }
|
---|
| 2550 |
|
---|
| 2551 | return 1;
|
---|
| 2552 | err:
|
---|
| 2553 | if (al != -1)
|
---|
| 2554 | ssl3_send_alert(s, SSL3_AL_FATAL, al);
|
---|
| 2555 | OPENSSL_clear_free(s->s3->tmp.pms, s->s3->tmp.pmslen);
|
---|
| 2556 | s->s3->tmp.pms = NULL;
|
---|
| 2557 | #ifndef OPENSSL_NO_PSK
|
---|
| 2558 | OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen);
|
---|
| 2559 | s->s3->tmp.psk = NULL;
|
---|
| 2560 | #endif
|
---|
| 2561 | ossl_statem_set_error(s);
|
---|
| 2562 | return 0;
|
---|
| 2563 | }
|
---|
| 2564 |
|
---|
| 2565 | int tls_client_key_exchange_post_work(SSL *s)
|
---|
| 2566 | {
|
---|
| 2567 | unsigned char *pms = NULL;
|
---|
| 2568 | size_t pmslen = 0;
|
---|
| 2569 |
|
---|
| 2570 | pms = s->s3->tmp.pms;
|
---|
| 2571 | pmslen = s->s3->tmp.pmslen;
|
---|
| 2572 |
|
---|
| 2573 | #ifndef OPENSSL_NO_SRP
|
---|
| 2574 | /* Check for SRP */
|
---|
| 2575 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
|
---|
| 2576 | if (!srp_generate_client_master_secret(s)) {
|
---|
| 2577 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK,
|
---|
| 2578 | ERR_R_INTERNAL_ERROR);
|
---|
| 2579 | goto err;
|
---|
| 2580 | }
|
---|
| 2581 | return 1;
|
---|
| 2582 | }
|
---|
| 2583 | #endif
|
---|
| 2584 |
|
---|
| 2585 | if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) {
|
---|
| 2586 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
|
---|
| 2587 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE);
|
---|
| 2588 | goto err;
|
---|
| 2589 | }
|
---|
| 2590 | if (!ssl_generate_master_secret(s, pms, pmslen, 1)) {
|
---|
| 2591 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
|
---|
| 2592 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR);
|
---|
| 2593 | /* ssl_generate_master_secret frees the pms even on error */
|
---|
| 2594 | pms = NULL;
|
---|
| 2595 | pmslen = 0;
|
---|
| 2596 | goto err;
|
---|
| 2597 | }
|
---|
| 2598 | pms = NULL;
|
---|
| 2599 | pmslen = 0;
|
---|
| 2600 |
|
---|
| 2601 | #ifndef OPENSSL_NO_SCTP
|
---|
| 2602 | if (SSL_IS_DTLS(s)) {
|
---|
| 2603 | unsigned char sctpauthkey[64];
|
---|
| 2604 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
|
---|
| 2605 |
|
---|
| 2606 | /*
|
---|
| 2607 | * Add new shared key for SCTP-Auth, will be ignored if no SCTP
|
---|
| 2608 | * used.
|
---|
| 2609 | */
|
---|
| 2610 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL,
|
---|
| 2611 | sizeof(DTLS1_SCTP_AUTH_LABEL));
|
---|
| 2612 |
|
---|
| 2613 | if (SSL_export_keying_material(s, sctpauthkey,
|
---|
| 2614 | sizeof(sctpauthkey), labelbuffer,
|
---|
| 2615 | sizeof(labelbuffer), NULL, 0, 0) <= 0)
|
---|
| 2616 | goto err;
|
---|
| 2617 |
|
---|
| 2618 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
|
---|
| 2619 | sizeof(sctpauthkey), sctpauthkey);
|
---|
| 2620 | }
|
---|
| 2621 | #endif
|
---|
| 2622 |
|
---|
| 2623 | return 1;
|
---|
| 2624 | err:
|
---|
| 2625 | OPENSSL_clear_free(pms, pmslen);
|
---|
| 2626 | s->s3->tmp.pms = NULL;
|
---|
| 2627 | return 0;
|
---|
| 2628 | }
|
---|
| 2629 |
|
---|
| 2630 | int tls_construct_client_verify(SSL *s)
|
---|
| 2631 | {
|
---|
| 2632 | unsigned char *p;
|
---|
| 2633 | EVP_PKEY *pkey;
|
---|
| 2634 | const EVP_MD *md = s->s3->tmp.md[s->cert->key - s->cert->pkeys];
|
---|
| 2635 | EVP_MD_CTX *mctx;
|
---|
| 2636 | unsigned u = 0;
|
---|
| 2637 | unsigned long n = 0;
|
---|
| 2638 | long hdatalen = 0;
|
---|
| 2639 | void *hdata;
|
---|
| 2640 |
|
---|
| 2641 | mctx = EVP_MD_CTX_new();
|
---|
| 2642 | if (mctx == NULL) {
|
---|
| 2643 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_MALLOC_FAILURE);
|
---|
| 2644 | goto err;
|
---|
| 2645 | }
|
---|
| 2646 |
|
---|
| 2647 | p = ssl_handshake_start(s);
|
---|
| 2648 | pkey = s->cert->key->privatekey;
|
---|
| 2649 |
|
---|
| 2650 | hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
|
---|
| 2651 | if (hdatalen <= 0) {
|
---|
| 2652 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
|
---|
| 2653 | goto err;
|
---|
| 2654 | }
|
---|
| 2655 | if (SSL_USE_SIGALGS(s)) {
|
---|
| 2656 | if (!tls12_get_sigandhash(p, pkey, md)) {
|
---|
| 2657 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
|
---|
| 2658 | goto err;
|
---|
| 2659 | }
|
---|
| 2660 | p += 2;
|
---|
| 2661 | n = 2;
|
---|
| 2662 | }
|
---|
| 2663 | #ifdef SSL_DEBUG
|
---|
| 2664 | fprintf(stderr, "Using client alg %s\n", EVP_MD_name(md));
|
---|
| 2665 | #endif
|
---|
| 2666 | if (!EVP_SignInit_ex(mctx, md, NULL)
|
---|
| 2667 | || !EVP_SignUpdate(mctx, hdata, hdatalen)
|
---|
| 2668 | || (s->version == SSL3_VERSION
|
---|
| 2669 | && !EVP_MD_CTX_ctrl(mctx, EVP_CTRL_SSL3_MASTER_SECRET,
|
---|
| 2670 | s->session->master_key_length,
|
---|
| 2671 | s->session->master_key))
|
---|
| 2672 | || !EVP_SignFinal(mctx, p + 2, &u, pkey)) {
|
---|
| 2673 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_EVP_LIB);
|
---|
| 2674 | goto err;
|
---|
| 2675 | }
|
---|
| 2676 | #ifndef OPENSSL_NO_GOST
|
---|
| 2677 | {
|
---|
| 2678 | int pktype = EVP_PKEY_id(pkey);
|
---|
| 2679 | if (pktype == NID_id_GostR3410_2001
|
---|
| 2680 | || pktype == NID_id_GostR3410_2012_256
|
---|
| 2681 | || pktype == NID_id_GostR3410_2012_512)
|
---|
| 2682 | BUF_reverse(p + 2, NULL, u);
|
---|
| 2683 | }
|
---|
| 2684 | #endif
|
---|
| 2685 |
|
---|
| 2686 | s2n(u, p);
|
---|
| 2687 | n += u + 2;
|
---|
| 2688 | /* Digest cached records and discard handshake buffer */
|
---|
| 2689 | if (!ssl3_digest_cached_records(s, 0))
|
---|
| 2690 | goto err;
|
---|
| 2691 | if (!ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n)) {
|
---|
| 2692 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
|
---|
| 2693 | goto err;
|
---|
| 2694 | }
|
---|
| 2695 |
|
---|
| 2696 | EVP_MD_CTX_free(mctx);
|
---|
| 2697 | return 1;
|
---|
| 2698 | err:
|
---|
| 2699 | EVP_MD_CTX_free(mctx);
|
---|
| 2700 | return 0;
|
---|
| 2701 | }
|
---|
| 2702 |
|
---|
| 2703 | /*
|
---|
| 2704 | * Check a certificate can be used for client authentication. Currently check
|
---|
| 2705 | * cert exists, if we have a suitable digest for TLS 1.2 if static DH client
|
---|
| 2706 | * certificates can be used and optionally checks suitability for Suite B.
|
---|
| 2707 | */
|
---|
| 2708 | static int ssl3_check_client_certificate(SSL *s)
|
---|
| 2709 | {
|
---|
| 2710 | if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
|
---|
| 2711 | return 0;
|
---|
| 2712 | /* If no suitable signature algorithm can't use certificate */
|
---|
| 2713 | if (SSL_USE_SIGALGS(s) && !s->s3->tmp.md[s->cert->key - s->cert->pkeys])
|
---|
| 2714 | return 0;
|
---|
| 2715 | /*
|
---|
| 2716 | * If strict mode check suitability of chain before using it. This also
|
---|
| 2717 | * adjusts suite B digest if necessary.
|
---|
| 2718 | */
|
---|
| 2719 | if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
|
---|
| 2720 | !tls1_check_chain(s, NULL, NULL, NULL, -2))
|
---|
| 2721 | return 0;
|
---|
| 2722 | return 1;
|
---|
| 2723 | }
|
---|
| 2724 |
|
---|
| 2725 | WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst)
|
---|
| 2726 | {
|
---|
| 2727 | X509 *x509 = NULL;
|
---|
| 2728 | EVP_PKEY *pkey = NULL;
|
---|
| 2729 | int i;
|
---|
| 2730 |
|
---|
| 2731 | if (wst == WORK_MORE_A) {
|
---|
| 2732 | /* Let cert callback update client certificates if required */
|
---|
| 2733 | if (s->cert->cert_cb) {
|
---|
| 2734 | i = s->cert->cert_cb(s, s->cert->cert_cb_arg);
|
---|
| 2735 | if (i < 0) {
|
---|
| 2736 | s->rwstate = SSL_X509_LOOKUP;
|
---|
| 2737 | return WORK_MORE_A;
|
---|
| 2738 | }
|
---|
| 2739 | if (i == 0) {
|
---|
| 2740 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
|
---|
| 2741 | ossl_statem_set_error(s);
|
---|
| 2742 | return 0;
|
---|
| 2743 | }
|
---|
| 2744 | s->rwstate = SSL_NOTHING;
|
---|
| 2745 | }
|
---|
| 2746 | if (ssl3_check_client_certificate(s))
|
---|
| 2747 | return WORK_FINISHED_CONTINUE;
|
---|
| 2748 |
|
---|
| 2749 | /* Fall through to WORK_MORE_B */
|
---|
| 2750 | wst = WORK_MORE_B;
|
---|
| 2751 | }
|
---|
| 2752 |
|
---|
| 2753 | /* We need to get a client cert */
|
---|
| 2754 | if (wst == WORK_MORE_B) {
|
---|
| 2755 | /*
|
---|
| 2756 | * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP;
|
---|
| 2757 | * return(-1); We then get retied later
|
---|
| 2758 | */
|
---|
| 2759 | i = ssl_do_client_cert_cb(s, &x509, &pkey);
|
---|
| 2760 | if (i < 0) {
|
---|
| 2761 | s->rwstate = SSL_X509_LOOKUP;
|
---|
| 2762 | return WORK_MORE_B;
|
---|
| 2763 | }
|
---|
| 2764 | s->rwstate = SSL_NOTHING;
|
---|
| 2765 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) {
|
---|
| 2766 | if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey))
|
---|
| 2767 | i = 0;
|
---|
| 2768 | } else if (i == 1) {
|
---|
| 2769 | i = 0;
|
---|
| 2770 | SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE,
|
---|
| 2771 | SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
|
---|
| 2772 | }
|
---|
| 2773 |
|
---|
| 2774 | X509_free(x509);
|
---|
| 2775 | EVP_PKEY_free(pkey);
|
---|
| 2776 | if (i && !ssl3_check_client_certificate(s))
|
---|
| 2777 | i = 0;
|
---|
| 2778 | if (i == 0) {
|
---|
| 2779 | if (s->version == SSL3_VERSION) {
|
---|
| 2780 | s->s3->tmp.cert_req = 0;
|
---|
| 2781 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE);
|
---|
| 2782 | return WORK_FINISHED_CONTINUE;
|
---|
| 2783 | } else {
|
---|
| 2784 | s->s3->tmp.cert_req = 2;
|
---|
| 2785 | if (!ssl3_digest_cached_records(s, 0)) {
|
---|
| 2786 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
|
---|
| 2787 | ossl_statem_set_error(s);
|
---|
| 2788 | return 0;
|
---|
| 2789 | }
|
---|
| 2790 | }
|
---|
| 2791 | }
|
---|
| 2792 |
|
---|
| 2793 | return WORK_FINISHED_CONTINUE;
|
---|
| 2794 | }
|
---|
| 2795 |
|
---|
| 2796 | /* Shouldn't ever get here */
|
---|
| 2797 | return WORK_ERROR;
|
---|
| 2798 | }
|
---|
| 2799 |
|
---|
| 2800 | int tls_construct_client_certificate(SSL *s)
|
---|
| 2801 | {
|
---|
| 2802 | if (!ssl3_output_cert_chain(s,
|
---|
| 2803 | (s->s3->tmp.cert_req ==
|
---|
| 2804 | 2) ? NULL : s->cert->key)) {
|
---|
| 2805 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR);
|
---|
| 2806 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
|
---|
| 2807 | ossl_statem_set_error(s);
|
---|
| 2808 | return 0;
|
---|
| 2809 | }
|
---|
| 2810 |
|
---|
| 2811 | return 1;
|
---|
| 2812 | }
|
---|
| 2813 |
|
---|
| 2814 | #define has_bits(i,m) (((i)&(m)) == (m))
|
---|
| 2815 |
|
---|
| 2816 | int ssl3_check_cert_and_algorithm(SSL *s)
|
---|
| 2817 | {
|
---|
| 2818 | int i;
|
---|
| 2819 | #ifndef OPENSSL_NO_EC
|
---|
| 2820 | int idx;
|
---|
| 2821 | #endif
|
---|
| 2822 | long alg_k, alg_a;
|
---|
| 2823 | EVP_PKEY *pkey = NULL;
|
---|
| 2824 | int al = SSL_AD_HANDSHAKE_FAILURE;
|
---|
| 2825 |
|
---|
| 2826 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
|
---|
| 2827 | alg_a = s->s3->tmp.new_cipher->algorithm_auth;
|
---|
| 2828 |
|
---|
| 2829 | /* we don't have a certificate */
|
---|
| 2830 | if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK))
|
---|
| 2831 | return (1);
|
---|
| 2832 |
|
---|
| 2833 | /* This is the passed certificate */
|
---|
| 2834 |
|
---|
| 2835 | #ifndef OPENSSL_NO_EC
|
---|
| 2836 | idx = s->session->peer_type;
|
---|
| 2837 | if (idx == SSL_PKEY_ECC) {
|
---|
| 2838 | if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) {
|
---|
| 2839 | /* check failed */
|
---|
| 2840 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT);
|
---|
| 2841 | goto f_err;
|
---|
| 2842 | } else {
|
---|
| 2843 | return 1;
|
---|
| 2844 | }
|
---|
| 2845 | } else if (alg_a & SSL_aECDSA) {
|
---|
| 2846 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
|
---|
| 2847 | SSL_R_MISSING_ECDSA_SIGNING_CERT);
|
---|
| 2848 | goto f_err;
|
---|
| 2849 | }
|
---|
| 2850 | #endif
|
---|
| 2851 | pkey = X509_get0_pubkey(s->session->peer);
|
---|
| 2852 | i = X509_certificate_type(s->session->peer, pkey);
|
---|
| 2853 |
|
---|
| 2854 | /* Check that we have a certificate if we require one */
|
---|
| 2855 | if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) {
|
---|
| 2856 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
|
---|
| 2857 | SSL_R_MISSING_RSA_SIGNING_CERT);
|
---|
| 2858 | goto f_err;
|
---|
| 2859 | }
|
---|
| 2860 | #ifndef OPENSSL_NO_DSA
|
---|
| 2861 | else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) {
|
---|
| 2862 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
|
---|
| 2863 | SSL_R_MISSING_DSA_SIGNING_CERT);
|
---|
| 2864 | goto f_err;
|
---|
| 2865 | }
|
---|
| 2866 | #endif
|
---|
| 2867 | #ifndef OPENSSL_NO_RSA
|
---|
| 2868 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK) &&
|
---|
| 2869 | !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) {
|
---|
| 2870 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
|
---|
| 2871 | SSL_R_MISSING_RSA_ENCRYPTING_CERT);
|
---|
| 2872 | goto f_err;
|
---|
| 2873 | }
|
---|
| 2874 | #endif
|
---|
| 2875 | #ifndef OPENSSL_NO_DH
|
---|
| 2876 | if ((alg_k & SSL_kDHE) && (s->s3->peer_tmp == NULL)) {
|
---|
| 2877 | al = SSL_AD_INTERNAL_ERROR;
|
---|
| 2878 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR);
|
---|
| 2879 | goto f_err;
|
---|
| 2880 | }
|
---|
| 2881 | #endif
|
---|
| 2882 |
|
---|
| 2883 | return (1);
|
---|
| 2884 | f_err:
|
---|
| 2885 | ssl3_send_alert(s, SSL3_AL_FATAL, al);
|
---|
| 2886 | return (0);
|
---|
| 2887 | }
|
---|
| 2888 |
|
---|
| 2889 | #ifndef OPENSSL_NO_NEXTPROTONEG
|
---|
| 2890 | int tls_construct_next_proto(SSL *s)
|
---|
| 2891 | {
|
---|
| 2892 | unsigned int len, padding_len;
|
---|
| 2893 | unsigned char *d;
|
---|
| 2894 |
|
---|
| 2895 | len = s->next_proto_negotiated_len;
|
---|
| 2896 | padding_len = 32 - ((len + 2) % 32);
|
---|
| 2897 | d = (unsigned char *)s->init_buf->data;
|
---|
| 2898 | d[4] = len;
|
---|
| 2899 | memcpy(d + 5, s->next_proto_negotiated, len);
|
---|
| 2900 | d[5 + len] = padding_len;
|
---|
| 2901 | memset(d + 6 + len, 0, padding_len);
|
---|
| 2902 | *(d++) = SSL3_MT_NEXT_PROTO;
|
---|
| 2903 | l2n3(2 + len + padding_len, d);
|
---|
| 2904 | s->init_num = 4 + 2 + len + padding_len;
|
---|
| 2905 | s->init_off = 0;
|
---|
| 2906 |
|
---|
| 2907 | return 1;
|
---|
| 2908 | }
|
---|
| 2909 | #endif
|
---|
| 2910 |
|
---|
| 2911 | int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
|
---|
| 2912 | {
|
---|
| 2913 | int i = 0;
|
---|
| 2914 | #ifndef OPENSSL_NO_ENGINE
|
---|
| 2915 | if (s->ctx->client_cert_engine) {
|
---|
| 2916 | i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
|
---|
| 2917 | SSL_get_client_CA_list(s),
|
---|
| 2918 | px509, ppkey, NULL, NULL, NULL);
|
---|
| 2919 | if (i != 0)
|
---|
| 2920 | return i;
|
---|
| 2921 | }
|
---|
| 2922 | #endif
|
---|
| 2923 | if (s->ctx->client_cert_cb)
|
---|
| 2924 | i = s->ctx->client_cert_cb(s, px509, ppkey);
|
---|
| 2925 | return i;
|
---|
| 2926 | }
|
---|
| 2927 |
|
---|
| 2928 | int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, unsigned char *p)
|
---|
| 2929 | {
|
---|
| 2930 | int i, j = 0;
|
---|
| 2931 | const SSL_CIPHER *c;
|
---|
| 2932 | unsigned char *q;
|
---|
| 2933 | int empty_reneg_info_scsv = !s->renegotiate;
|
---|
| 2934 | /* Set disabled masks for this session */
|
---|
| 2935 | ssl_set_client_disabled(s);
|
---|
| 2936 |
|
---|
| 2937 | if (sk == NULL)
|
---|
| 2938 | return (0);
|
---|
| 2939 | q = p;
|
---|
| 2940 |
|
---|
| 2941 | for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
|
---|
| 2942 | c = sk_SSL_CIPHER_value(sk, i);
|
---|
| 2943 | /* Skip disabled ciphers */
|
---|
| 2944 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED))
|
---|
| 2945 | continue;
|
---|
| 2946 | j = s->method->put_cipher_by_char(c, p);
|
---|
| 2947 | p += j;
|
---|
| 2948 | }
|
---|
| 2949 | /*
|
---|
| 2950 | * If p == q, no ciphers; caller indicates an error. Otherwise, add
|
---|
| 2951 | * applicable SCSVs.
|
---|
| 2952 | */
|
---|
| 2953 | if (p != q) {
|
---|
| 2954 | if (empty_reneg_info_scsv) {
|
---|
| 2955 | static SSL_CIPHER scsv = {
|
---|
| 2956 | 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
|
---|
| 2957 | };
|
---|
| 2958 | j = s->method->put_cipher_by_char(&scsv, p);
|
---|
| 2959 | p += j;
|
---|
| 2960 | }
|
---|
| 2961 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) {
|
---|
| 2962 | static SSL_CIPHER scsv = {
|
---|
| 2963 | 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
|
---|
| 2964 | };
|
---|
| 2965 | j = s->method->put_cipher_by_char(&scsv, p);
|
---|
| 2966 | p += j;
|
---|
| 2967 | }
|
---|
| 2968 | }
|
---|
| 2969 |
|
---|
| 2970 | return (p - q);
|
---|
| 2971 | }
|
---|